How does a magnifying glass work?

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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?

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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)