How does a magnifying glass work?

http://www.google.com/imgres?imgurl=http://www.webzo.org/tutorials/flash/images/magnifying-glass

A magnifying glass is a convex lens that is meant to be held near an object to see it magnified.When a magnifying glass is held near an object,the light rays are widened before they are focused on our eyes,causing the object to appear very large.In order for this to occur,the distance between the lens and the object must be shorter than the focal length of the lens.

Source:
http://www.wisegeek.com/how-does-a-magnifying-glass-work.htm
http://www.answers.com/topic/how-does-a-magnifying-glass-work
http://en.wikipedia.org/wiki/Magnifying_glass

How does a manifyign glass light up a matchstick?

A combustible material,when exposed to heat and a source of oxygen,produces fire. Holding a mangnifying glass so that the rays of light passing through the lens meet on the matchstick, concentrates on the energy of the photons in a single spot and produces greater heat then the heat we feel on our skin from the Sun. Then,flame is produced.

How does a manifying glass works?

A manifying glass works by creating a magnified virtual image of an object behind the lens.The distance between the lens and the object must be shorter than the focal length of the lens for this to occur.Otherwise,the image will appear smaller and inverted, and can be used to project images onto surfaces.

The framed lens may be mounted on a stand, keeping the lens at the right distance from the table, and therefore at the right distance from the object on the table. The latter applies if the object is small, and also if the height is adjustable. Some magnifying glass are foldable (from the handle or stand)

wikipedia.

How does a magnifying glass work?

A magnifying glass is basically a convex lens which works by creating a magnified virtual image of the object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for this to occur. Otherwise, the image will be diminished and inverted, and can be used to project images onto surfaces instead.

To maximise the magnifying power, one should hold the lens near to the eye and adjusting the lens and eye together to obtain the best possible focus.

Tan Chee Yoong

How does a magnifying glass works?

(http://www.calledtocommunion.com/wp-content/uploads/2009/09/magnifying-glass.jpg)

First things first, what is a magnifying glass?
As you can see in the image above, it is a convex lens which is used to produce a bigger image of the object.
An example is that you are trying to read a book.
However, the words are too small for you to see.
Thus, you can use the magnifying glass to magnify to the words, so that you are able to read. The glass is usually shaped in a circle with a handle attached to it for support.

Next, how does a magnifying glass works?
It works by creating a magnified virtual image of the object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for it to work.

Source: (http://en.wikipedia.org/wiki/Magnifying_glass)

Lighting up matchstick with magnifying glass .

The light rays is refracted when they reach the glass and it is focus on one direction which is the matchstick and the heat lights it up .

How does a magnifying glass work

A magnifying glass is simply a convex lens meant to be held up to an object to see it magnified. This shape bends the light waves of objects viewed through it, causing us to see them in unusual ways. When you hold a magnifying glass close to an object, its light waves are widened before they are focused on your eyes, causing the object to appear very large. But when you hold a magnifying glass out and view a distant object with it, the item appears smaller and upside down. This effect is due to the image being beyond the focus of the lens. The more curved a convex lens is, the greater its ability to bend light and magnify.

How Does A Magnifying Glass Work?

http://www.flickr.com/photos/enforces/3491341160/

A magnifying glass works by creating a magnified virtual image of an object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for this to occur. Otherwise, the image appears smaller and inverted, and can be used to project images onto surfaces.

How does a magnifying glass work?

A magnifying glass works by creating a magnified virtual image of an object behind the lens. The distance between the lens and the object must be shorter than the focal length of the lens for this to occur.

The magnifying glass refracts the ray to a point called focal point. It is where the rays coming from the Sun in a parellel manner gets refracted into the focal area. The heat from the Sun also gets refracted to that focal area. Thus, fire can be ignited through maginifying glass.

http://www.flickr.com/photos/rimas/3679497940/

light up matches with magnifing glass

Light emitted by the sun is made up of tiny packets of electromagnetic energy.the rays are refracted and due to the rays of light and its ability change angle as they pass through the lens and meet at a specific point.also with the preasence of oxygen,a fire is lit up.

http://drivenoutside.com/blog/wp-content/uploads/2010/06/magnifying-glass.jpg

How to does a matchstick lit up with a magnifying glass .

How to does a matchstick lit up with a magnifying glass .

A magnifying glass can be used to focus light into one direction.
This allows us to use the magnifying glass to light up a matchstick inside of using the usual method.

However , it is necessary to hold the magnifier at the distance of it's focal length. Using trial & error will help to achieve the best result.

The head of the match stick contains either phosphorus or phosphorus sesquisulfide , once light is directly focused on it, the molecues inside will start to vibrate. Vibrations means that the tip of the matchstick will get a lot of movement & it will ignite.

How can a match stick be light up with a magnifying glass? (REGISTER NO. 24)

Firstly, you need to know how a magnifying glass works.

A magnifying glass is a convex lens. That means that the magnifying glass consists of two sides of glass and that it is thicker in the middle than the outer edges. That shape of the glass distorts the way we see the image on the other side.



How the image gets distorted is because of the rays that was refracted. The rays are refracted to a focused area called focal point. As we look at the magnifying glass, it is of course magnified. It is the bending of light.




So how did the matchstick get lit up? HOW?!
There is only one simple concept behind this. As the light rays gets refracted to one point, so is the heat. The parellel heat and light rays from the sun got refracted into the focal point through the lens. Thus, lighting up a matchstick.

How does a magnifying glass light up a matchstick

The magnifying glass uses a convex lens.Therefore,when beams of light passes through the lens,it will be focus onto a focal point.As the tip of the matchstick is made up of flammable chemical,a single point of light will cause the temperature to be high enough to have a chemical reaction with the matchstick,thus lighting it up.

Source:mcat-review.org/light-geometrical-optics.php
http://www.ehow.com/how_2466_start-fire-without-matches.html

How to light up a match stick using a magnifying glass

Angle the lens towards the sun in order to focus the beam into as small an area as possible. The sun ray will focus into one focal point.

Put the match stick under the spot and the heat will soon light up the match stick.

http://artofmanliness.com/2008/04/29/9-ways-to-start-a-fire-without-matches/

How does a matchstick light up by using a magnifying glass ?

Light emitted by the sun is made up of photons, tiny packets of electromagnetic energy. Photons behave both as particles and waves. This quality is important because the nature of photons means that they are refracted when they pass through different media. The lens of a magnifying glass is curved to refract light particles in such a way that the eye perceives a larger image. A magnifying glass causes rays of light to change angle as they pass through the lens and meet at a specific point, focusing the energy of the photons. A combustible material, when exposed to heat and a source of oxygen, produces fire. Holding a magnifying glass so that the rays of light passing through the lens meet on a dry, flammable item, such as a piece of paper, concentrates the energy of the photons in a single spot and produces greater heat than the heat we feel on our skin from the sun. http://www.ehow.com/about_5256784_magnifying-glass-make-fire.html

How does a matchstick be lit up by using a magnifying glass?

(http://www.wildwoodsurvival.com/survival/fire/magnifier/index.html)

The answer is simple.
However, to do this, the focal point of the lens (of the magnifying glass) has to be at the right spot, like the image below. Just make sure that to hold the magnifying glass at the correct distance, so that there will be a huge amount of light going to the tip of the matchstick. The correct distance is when the bright dot is really small and where you can see a full circle on the matchstick.

(http://farm4.static.flickr.com/3063/2730103489_06f117680a_o.jpg)

How does a match stick light up by using magnifying glass.

The magnifying glass is a convex lens. It can be used to make the obeject look bigger or a concentrator of the sun rays for heating and fire lighting purposes. When the magnifying glass is place on top of the match, it would form a small point of light on the tip of the match stick. If the match stick is dry, together with the strong sun rays and the focal strength of the lens is adequate, the match stick will ignite as sufficient amount of heat and light is needed to ignite the match stick.

How does a magnifying glass light up a match stick

A magnifying glass is a convex lens. It can light up a match stick using the sun's light ray. The glass will concentrate the sun’s rays into a much smaller focal point causing that area to heat up very quickly. When the match stick gets heated up, it will ignite. The magnifying glass is also able to burn other materials.

How does a match stick be lit up with a magnifying glass?

A magnifying glass has a convex or converging lens. When a parallel beam of light passes through the lens, the light is brought to a focus point. Light that enter the lens at a single point are sufficient to raise the temperature and the temperature is high enough for a chemical reaction to occur.

To lit up the match stick, hold your magnifying glass at a comfortable direction and slighty 0.5m - 1.0m away from the match stick. Try adjusting the glass to redirect the sunlight and focus it directly on the black head of the match stick. Try not to move your hands and if you are lucky enough, with the strong sunlight, within a minute you can lit up your match stick!

Believe it or not, check out the below video!





http://hubpages.com/hub/magnifying-glass
http://matchsticks.com/Start_a_Fire_Without_Matches.htm

Magnifying glass

How does a matchstick light up by using a magnifying glass?

Wikipedia's scientist version:
The sun emits a particle known as a photon.
It carries visible light to earth.
These photons contain energy, which radiate in the form of heat.
When you put a magnifying glass in the paths of these photons,
the convex lense of glass narrows and focuses the photons,
making them converge on a narrower point then if the lense wasn't there.
This concentration of photons concentrates the heat that they emit,
heating the matchstick up until it ignites at a certain temperature (about 451 degrees F).

Kimberly' simplified version:
The sun emits photons.
which carries light and contains heat energy.


When the magnifying lense gets in the way of the photons,
the convex lense of glass narrows and focuses the photons.

All the focused heat energy causes the object to catch fire.


and,
VOILA!
you got fire (:

It's amazing how scientists find out stuff like this isn't it?



Credits:
Wikipedia
drawing-DONE BY ME!

How does a match stick be lit up with a magnifying glass?

It is actually possible to lit up a matchstick with a magnifying glass.
When we focus the light rays at one particular point of the magnifying glass, and it will pass through, reaching on the tip of the matchstick.
The heat and friction caused by the light rays will heat up the matchstick.

Matchstick is made up of solidified mixture of flammable chemicals.
The matchstick is able to light up because,the friction caused generates enough heat to ignite the chemical and produce a small flame.

how does a magnifying glass light up a match

A magnifying glass is basically a convex lens to focus on a point . It works by creating a magnified virtual image of an object behind the lend . Therefore if we try to focus the light ray from the sun to a match stick . The light ray will then ignite the match .
Keng wai [ 3e3 ]

How does a matchstick light up with a magnifying glass

It is possible to light up a match with the use of a magnifying glass instead of the normal way we use it. When sunlight enters the glass pane of the magnifying glass, it bends and it is focused at one point. Thus, the beam of the light is focused and the energy of heat is very high. If the beam of light is focused on the tip of the match, the match would be able to light up. This method can only be used if the source of energy is the sunlight instead of normal light lamps. By adding some water onto the lens, it will intensify the beam thus, the focused beam is more empowered and the match would catch fire more easily.

igniting a matchstick using a magnifying glass

athe magnifying glass is able to focus all the light energy to a single point.when the magnifying glass focuses the light rays of the sun at the matchstick,after a certain period of time,the matchstick will ignite.the magnifying glass is also able to burn many other things like paper, leaf,grass and even insects like ants.

How does a match stick be lit up with a magnifying glass?

With a magnifying glass, we are able to focus the sun rays onto a point.
When we place the head of the matchstick on the focus point,
the heat from the rays will light the match stick, causing it to light up.

The head of the match stick contains either phosphorus or phosphorus sesquisulfide,
which will ignite with the heat created from friction or just direct heat.
The sun rays focusing on the head of the match stick is high enough to ignite it.

The above picture is an example of how a magnifying glass is able to focus onto a point,
which is the butterfly.

Picture taken from http://www.goalfinder.com/product.asp?productid=26

Tan Chee Yoong

How does the matchstick lit up using a magnifying glass

By using a magnifying glass , it is possible to lit up a matchstick. determine the focal length of the magnifying glass, the heat from the sun is than shone onto the focal point of the magnifying glass whereby all the light rays are concentrated at the focal point of the magnifying glass. this is where all the heat is intense and have high temperature. after a period of time, the matchstick will then be able to be lit up by the sun.

How does a matchstick get ignited by a magnifying glass?

To burn a matchstick using a magnifying glass, it is important to have the sun shining brightly so the we can concentrate its rays through the glass and onto the tip of the matchstick. This will cause the tip of the matchstick to burn.

How does a matchstick light up with a magnifying glass

Light which enters the magnifying glass are focus at a point . The focused sunlight which comes out of the magnifying glass have high energy. Thus, if the focused sunlight ray is pointed at the tip of the matchstick which contains phosphorus sesquisulfide as the active ingredient and gelatin as a binder, the match head would light up without the use of friction. This is due to the intense heat focused at one point .

Hoe does a matchstick be light up with a magnifying glass.

http://ncealevel2sci.wikispaces.com/file/view/lensmagnifying.png
According to my research:



Sunlight can be used as a focus at a point with the assist of a magnifying glass and when we place the match stick at that focus point,the match stick can get enough heat and it will light up.

Because friction produces heat so when the match stick strike against the the match box,the match stick lights up.

However without the match box,using the magnifying glass,the magnifying glass concentrates the heat and the light of the sun on the tip of the match stick,the tip of the match stick became hot and it light up.

http://www.arvindguptatoys.com/arvindgupta/ScienceAction3.pdf

How does a matchstick be lite up with a magnifying glass?

Firstly, let me introduce to you of what is a magnifying glass. A magnifying glass is a convex lens which is used to produce a magnified image of an object.





How does it work? It works by creating a virtual magnified image of an object behind the lens.









Well, referring to today's post: How does a matchstick be lite up with a magnifying glass?


According to my researches on the Internet, I have found some appropriate answers for today's post!

By focusing the rays of the Sun on a pile of dry leaves, grass or grass roots, a fire can be started.




www.youtube.com/watchv=TiKM4TVTmjU&feature=player_embedded :-)

Physics graded assignments ( reg 35 )

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?
The smaller the angle, there would be more images the mirror would produce.

2) What happens to the images of this angle if it is bigger than 90(degrees)?
Similarly, the bigger the angle, there would be lesser images the mirror would produce.

3) How do mirrors produce funny images?Concave mirrors " stretches " your image sideways, causing it to look fat. Convex mirrors however, causes your image to look thin as it is dented in the middle.

Tan Chee Yoong (35)
3e3

Chemistry Assignment ( Reg. 35 )

(1 ) Microwaved food is believed to contain microwaves. How safe is microwaved food ?
Eating microwaved food causes significant changes in blood chemistry over time. A decrease in hemoglobin and cholesterol values, in the HDL (good cholesterol) versus LDL (bad cholesterol) ratio and in white blood cells, weakening the immune system, and an increase in leukocyte levels, which tends to indicate poisoning and cell damage. Eating microwaved foods can cause degenerative diseases or cancer as well.

Microwaves are used in gene-altering technology to deliberately break cells and neutralize their "life-force" so they can be manipulated. Microwaves destroy the life-force that gives food its vitality and nourishment. When this life-force depletes, microorganisms start breaking the food down and will start to rot.

In conclusion, the safest way to heat up your food is to use the stove and not by microwaving.

(2) Reports have linked charred food to cancer. How safe is BBQ food ?
The reports mainly focus on scientific studies involving benz pyrenes. Benz pyrenes are carcinogenic particles found in charred foods. Based on studies with laboratory rats, scientists found that ingesting large amounts of benz pyrenes may cause cancer. The average person would need to eat heavily charred foods at each meal in order to replicate the studies. On average, people eat grilled foods once or twice a week at most. If food is heavily charred, people typically throw it away and start over, or at least cut that part off. In conclusion, BBQ food is quite safe even if you do get your food a little bit charred. People with common sense would just cut the charred part off. If the food gets burnt to a crisp, people would just throw it away and redo it. Thus, chances of getting cancer by ingesting charred food is very slim.

Source(s): http://www.xpeditionsmagazine.com/magazine/articles/kathy/microwave.html and http://www.bbqmyths.com/grilledfoods.html

Tan Chee Yoong
35
3e3

Physics Assignment( REG 20 )

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90 degrees?

-It will reflect more than 3 images

2) What happens to the images of this angle if it is bigger than 90 degrees?

-Lesser than 3 images will be formed.

3)how do mirrors produce funny images?

It usually depends on how the mirror bend, like convex and concave.Convex bends outward while concave bends inward .It can be usually found in a convenient store as it used to let the store owner to see if there any shoplifter as it can reflect the image of the whole shop.

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90degrees?

-there will be more than two images formed, as the mirrors will reflect each other, creating more virtual image of the object along with it.

2) What happens to the images of this angle if it is bigger than 90degrees?

-there will be two or less image formed.

3)how do mirrors produce funny images?

-when mirror surface is uneven. eg. concave and convex

Physics Graded Assignment (REG NO. 04)

1. How many images would you get for an object that is placed between two mirrors placed at an angle less than 90 degrees?

I should get 3 images.


2. What happens to the images of this angle if it is bigger than 90 degrees?

There will be lesser images produced.


3. How do mirrors produce funny images?

There are different types of mirrors, Concave and Convex. Concave mirrors will make us look slimmer as it is curved inwards. Convex mirrors will be the opposite, making us look fatter because it tends to pop out.

Mirrors .

1) About 3 images are produced .

2)The larger the angle , the number or images will be reduced .

3) Different mirrors reflect different kind of image due to the present of Convex/Concave mirrors , which change the image produced .

Physics graded assignment

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

There should be 2-3 images as more images are produced if the angles are smaller.

2) What happens to the images of this angle if it is bigger than 90(degrees)?

The number of images produced will decrease.

3) How do mirrors produce funny images?

This is because of mirrors known as convex and concave mirrors. Convex mirrors bulge outwards therefore making us look fatter while Concave mirrors bulge inwards making us look thinner.

Taken from:http://en.wikipedia.org/wiki/Curved_mirror

HOMEWORK!

added on homework.
Hand in by the next physics lesson, 4 may.

Physics workbook
Exercise 12.1 and 12.2

MUST DO!!

Physics graded assignment(mirrors)

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

There will be at least 3 images reflected as the smaller the angle the more the images.

2) What happens to the images of this angle if it is bigger than 90(degrees)?

When the angle is bigger,there will be less image .

3) How do mirrors produce funny images?

It produce funny images because of concave and convex mirrors.
As concave mirror are spherical mirror,so when a person stand in front of it,the person will looked fat.
However convex mirror is totally different,convex mirror are curved mirror , it will let the person look thinner and skinnier when the person stood in front.

1)when two mirrors are placed at a 90 degree angle,there would first be 2 images,one from the first mirror and the second image from the second mirror.the other two images are reflections from the first two images.

2)if the bigger the angle,the lesser images there are.when the angle is 180 degrees which means it is a straight line,there would be only one image.

3)funny images can only be made by a concave or convex mirror.when this two mirrors are made into a single mirror,the combination of this two mirrors would form funny images.thus,when the two mirrors are formed into one,this is the result of you looking long or fat in the mirror.

Physics Graded Assignment [Number 39]

1) How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?
When an object is placed between two mirrors that are placed at an angle which is lesser than 90degrees, there would be a minimum of 3 images formed. This is because light would reflect and bounce between the mirrors before it reaches your eye. Thus, the smaller the angle, the more images you see.

2) What happens to the images of this angle is it is bigger than 90(degrees)?
This is the exact opposite of having angles smaller than 90degrees. This means that the bigger the angle, the lesser images you see

3) How do mirrors produce funny images?
Different shapes of mirrors have different properties.
Convex = Convex mirrors are also curved mirrors, but the silvered surface bulges outward instead of inward.
Concave = Concave are spherical mirror.
When a person stands in front of a convex mirror, he/she would look thinner & slimmer .For a concave mirror, it would be the exact opposite.


http://van.physics.illinois.edu/qa/listing.php?id=1987

Networking project for chemistry (Register no. 25)

1 ) Microwaved food is believed to contain microwaves. How safe is microwaved food ?

Answer:

1) Microwaved food is safe to eat but consuming it too much will cause health problems to our body. Microwaved food contains high amounts of fat and salt, which can lead to obesity. There are also radioactive waves used to heat up the food. As the waves pass through water, it reacts with it to get heat, this heat is used to cook the food. So it is best not to eat microwaved food so often.

Networking project for chemistry (Register no. 24)

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

If an object is placed infront of the mirror which is around 45 degree, it will show 7 to 8 images. If you place the mirrors at an angle lesser than 45degree, you get to see approximately 9 to 10 images. This means that the lesser the angle of the two mirrors, the more image will be shown on the mirror.


2) What happens to the images of this angle if it is bigger than 90(degrees)?

As mentioned ealier, lesser than 45 degree angle of the two mirror show 9 to 10 images, mirror placed at 45degree angle will show 7 to 8 images. In this manner, you can see that the more the degree angle of the mirror, the lesser images were formed. So if it is more than 90 degree, the images shown will be decreased.


3) How do mirrors produce funny images?

There are three types of mirror. Only two types of them produces wierd and funny images. It is the concave and convex mirrors. Both types of mirror has an axis is at the middle. Concave mirrors are mirrors that are bent in around the axis area. Due to this pattern, the light shone on it will be reflected towards point F as shown on the picture below.






http://www.splung.com/content/sid/4/page/concavemirrors

The other type of mirror is a convex mirror, the area around the axis is bent out. Due to this opposite pattern of a concave, its property about light will be opposite too. Instead of bending inwards, the light will be bent outwards




http://www.physicsclassroom.com/class/refln/u13l4a.cfm

Physics Graded Assignment (reg 11).

1) How many images would you get for an object that is placed between two mirrors placed at an angle less than 90°?

For example, if the object is placed at an angle of 45 degrees, there will be 7 images reflected. This is because there is a pattern of the smaller the angle is, the more images can be reflected.

2) What happens to the images of this angle is it is bigger than 90°?

As the angle increases, there will be lesser images reflected. Eventually, as the mirrors are 180°which means that it is a single line of mirror, there will only be one image reflected.

3) How do mirrors produce funny images?
 
Mirrors of different shapes have their own effects. An example is that the middle mirror is concave and stretches your image sideways to produce a fat version of you. The mirror on the right is a convex mirror and it produces another version of you. The mirror on the left is a combination of both. Thus, you will see different images of yourself.
 
Sources from:
(http://homepage.mac.com/cbakken/obookshelf/mmirrors.html)
(http://www.science.edu.sg/ssc/detailed.jsp?artid=3418&type=5&root=88&parent=115&cat=200)

Physics assignment

Let's get started (:

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

I could not really find good pictures on the internet.
So i tried it out myself.



As you can see,
It turns out that the smaller the angle,
The more images the mirror would produce.
For example, If I were to make the mirrors closer together,
More 'kim!'s will be reflected.

It's like how more people(object) would go to the shop that has more discounts(angle) (:


2) What happens to the images of this angle if it is bigger than 90(degrees)?



Just like the picture above,
The bigger the angle, the lesser the 'kim!'s.
As for my own experiment,
I did not get more then 4 reflected images if the angle was over 90degrees.

You might think I'm going to add a catchy phrase here.
But I'm not going to.
Because I can't think of anything.

3) How do mirrors produce funny images?



A slight curve along only one axis can make a person look fat or skinny.
To make you look thin, your image needs to be compressed horizontally or extended vertically.
So for those who wants to be thinner, bend you mirror.
If the center bulges out a little bit, you will appear shorter.
but your size will not be changed.
This can make a person look fatter than in real life.
If the center bends back a little, then you may look taller without looking any bigger.

Most mirrors bend over time.
So if you feel fatter/thinner/taller/shorter then you are supposed to be,
Buy a new mirror.

So the next time someone looks in the mirror and says:
"Does this dress make me look fat?"
or
"I think these jeans make my butt look big"

Just tell them to buy a new mirror.


*extra information*
Ever heard of a kaleidoscope?
It's a tube-shaped thing that allows you to see mesmerizing patterns.
It also uses Reflections from the mirror to create a repeated pattern.
If there were no mirrors in the kaleidoscope,
All you would see is sparkling things.







Credits:
Wikipedia
webb.nmu.edu
newton

PHYSICS Graded Assignment reg no. 25

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

2) What happens to the images of this angle if it is bigger than 90(degrees)?

3) How do mirrors produce funny images?

Answer:

1) If an object is placed between two mirrors placed at an angle less than 90 degrees, there will be two or more images seen on the mirror. As the angle decreases, the more images i will get.

2) If the angle of the two mirrors is more than 90 degrees, lesser images can be seen. This is because the mirrors are not facing each other directly, and it will reflect less of the object.

3) Only two types of mirrors can produce funny images. They are the concave and convex mirrors. When light is reflected on them, the image is reflected into another direction.

Networking Project for Science Chemistry [Register Number 39]

1) Microwaved food is believed to contain microwaves. How safe is microwaved food?
Mircowaved food doesn't contain mircorwaves. Mircowaves is used for heating up the food. The food doesn't literally absorb the mircowaves. Mircowaved foods aren’t that safe. There are many factors that affect this. However, if you consume them once a while, it would be all right and won't harm you .Different studies have shown possible links between microwave food and lowered electrochemical activity in the brain. The radiation might affect the nerves system; these would happen only if they are always exposed to the microwaves. This would result in headaches, backaches, disorientation, and altered brain wave patterns.
Another factor is the type of container to hold the food while microwaving them. Plastic would melt over a substantial amount of time. The toxins would be deadly.
Chemical changes in the food would also be deadly. In some studies, excessive consumption of micro waved food has led to decreased haemoglobin in the blood (the molecule necessary for transporting oxygen to cells), decreased beneficial HDL cholesterol, and decreased numbers of disease-fighting white blood cells. Long term consumption may lead to anaemia, lowered immune responses, and a greater risk of heart disease.

(2) Reports have linked charred food to cancer. How safe is BBQ food?
Only grilling over a high heat is unsafe. Researchers have tracked more than 62,000 people for nine years. They found those who preferred very well done steak were nearly 60 percent more likely to develop pancreatic cancer. Experts say frying or grilling meat at high temperatures generates cancer-causing chemicals.

Links.

http://abclocal.go.com/wls/story?section=news/health&id=6773469
http://safety.lovetoknow.com/Dangers_of_Microwave_Food

Physics (#12)

1) How many images an object would have if you place it between two mirrors placed at an angle less than 90 degrees?
2) What happens to the image of the angle is bigger than 90 degrees?
3) How do mirrors produce funny images?

1. There will be 2 images.


3. The surface of the mirror is not flat thus causing light ray to reflect at different angle . The image produced will then be distorted.



http://wiki.answers.com/Q/How_many_images_formed_when_two_mirrors_are_at_90_degree_angle&alreadyAsked=1&rtitle=How_many_images_will_be_formed_when_two_mirror

http://answers.yahoo.com/question/index?qid=20070531140400AADKMfH

Physics graded assignment (no.34)

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

The smaller the angle,the more images there are.Therefore,there will be more than two images forming on the mirrors.It is because when there more lights bouncing beween the mirrors,more images will be formed.

2) What happens to the images of this angle if it is bigger than 90(degrees)?

If the angle is bigger than 90 degrees,different views of the object will be formed.

3) How do mirrors produce funny images?

It produces funny images because when lights are being reflected on them,it will be reflected into another direction,therefore people are able to see themselves in weird shapes and sizes.

source:
http://www.physicsclassroom.com/class/refln/U13l2b.cfm

http://www.nygh.moe.edu.sg/projects/physics/light/light04-ReflectionFrom2Mirrors.htm

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

when a mirror is places less than 90 degrees, the number of images form is more than two. Because, as the angle is getting smaller, more images are being formed.

2) What happens to the images of this angle is it is bigger than 90(degrees)?

when you place a mirror at an angle of bigger then 90 degrees, you may get lesser than two images. Because, as the angle is getting wider, it will not reflect as much as the angle of lesser than 90 degrees.

http://www.newton.dep.anl.gov/askasci/phy05/phy05108.htm

3)how do mirrors produce funny images?

Most mirrorsbend over time top to bottom. If seen from the side, there is a slightcurvature in the edge. The top and bottom edges are usually straight. If the center bulges out alittle bit, your height will appear slightly smaller but your width will notbe changed. This can make a person look a little fat. If the center bendsback a little, then you can look a little taller without looking any wider.Mirrors can bend along other axes, but the one described is most likely.

Physics graded assignment on mirrors

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

There would be more images conjured if the angle of the mirrors are less than 90 degrees compared to the mirrors which are placed at 90 degrees.

2) What happens to the images of this angle if it is bigger than 90(degrees)?

There would be less images conjured if the angle of the mirrors are more than 90 degrees compared to the mirrors which are placed at lesser then 90 degrees.

3) How do mirrors produce funny images?

It is due to curved surfaces of the mirror. It either produces magnified or diminished images of an object.

Physics Graded Assignment ( Register No. 27 )

Q1)How many images would you get for an object that is place between two mirror's placed at an angle less than 90 degrees?
Answer: There will be a minimum of 2 images. The smaller the angle, the more images is produced.
Q2)What happen to image if the angle is more than 90 degrees?
Answer:When the angle is more than 90 degrees, there will be less than 2 image shown on the mirror. However, we can see different views of the object.
Q3)How do mirrors produce funny images?
Answer:Different kind of mirrors produces different kind of images.Convex mirror makes object look closer as it reflects light out. Certain mirrors are created in a way that it is bent in different angles and when light is reflected on them, it will be reflect the light in different direction, causing the image shown to be different in shapes and sizes of the original object.

1)How many images would you get for an object that is placed between two mirrors placed at an angle less than 90(degrees)?

2) What happens to the images of this angle is it is bigger than 90(degrees)?

3) How do mirrors produce funny images?


1)i would get 2 virtual images of the object.but if the degree of both the mirrors decreases,i would end up getting 4 or more virtual images of the object.
here are the picture results i gathered.

2 mirrors placed at an angle of 90degree

2 mirrors placedin an angle less than 90degree.

2)there are only 2 virtual images.

3)it is due to the concave and convex mirrors that produces funny images of ani object placed infront of it.