Mammoth Memory

Convex lens use – Magnifying glass

A magnifying glass is really a convex lens mounted in a frame with a handle.

A magnifying glass is a convex lens

It's used to enlarge items such as writing so it can be read more easily.

A magnifying glass tricks your eyes into believing there is something bigger behind the lens.

This magnification only works when the object being viewed is between the lens and one principal focal length. 

Ray diagram of a bug between one principal focal length and a convex lens

For a magnified image to be observed, the distance between the object and the lens has to be shorter than the focal length of the lens.

Ray diagram showing how a bug appears magnified when between 1F and a convex lens

The image formed is upright, magnified and virtual.

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