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.

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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.

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

E-learning assignment part 3 (reg.1)

Yes, there's a different in asymmetry between the sexes. Women's right-right composites were judged significantly more attractive than left-left composites while there's no left-right difference in men's composites.

As people grow older and older. Their faces will start growing wrinkles and their face's condition is not as good as in before. They will definitely look older as their age increase.

There are many types of people in this world. They can look very different from each other. Some people can have very dark skin while some can have very fair skin. It depends on how they look.

When the animal eats or drinks, food and fluids may fall from the lips. The animal may drool excessively, and food may collect between the lips and teeth.In small animals like dogs and cats with facial paralysis, the palpebral fissure may be slightly larger on the affected side

E-learning assignment part 2 (reg.1)

Have you ever think of why ice float? Like most things that float, ice floats because it is less dense than liquid water. Ice is about 9% less dense. When ice forms, it takes up about 9% more space than it did as a liquid. But in this case, if the freezing point becomes 10 degree c, the liquid get denser and couldn't float on the water anymore.

Many cold countries like greenland will face a greatly decrease of water supply. It will affect people's lives many other living organisms will also suffer. Most of the things get frozen easily and i'm sure that this will be a disaster to all those countries.

The invention of the bicycle

The first vehicle that resembled the bicycle was put together in 1645 in France by Jean Theson. However, it was a four-wheeled machine. About 1816, a two wheel contraption was invented in Germany. The passenger has to sit on a seat and propelled himself by running on the ground.The two wheeled bicycle as we know it today was invented in Dumfriesshire, Scotland, in 1839 by a man named Kirkpatrick Macmillan. The bicycle had no pedals or chain-activated gears. Instead there were two foot pedals attached to rods that connected to the back wheel. Unfortunately his invention never became popular. It was a French father-and-son team, Pierre and Ernest Michaux, to build the bicycle from which the present popularity of the vehicle is derived.