gcsescience.com                                       24                                       gcsescience.com

Waves

What is a Lens?

A lens is a transparent curved device that is used to refract light.

A lens is usually made from glass. There are two
different shapes for lenses. They are called convex and concave.

What is a Convex Lens?

A convex lens is thicker in the middle and thinner at the edges.
A convex lens is also called a converging lens.
A convex lens will focus light and make an image.
The image formed by a convex lens is real and inverted
(and can be bigger or smaller than the object)
unless it is being used as a magnifying glass when
the image will be virtual, upright and bigger than the object.

What is a Concave Lens?

A concave lens is thinner in the middle and thicker at the edges.
A concave lens is also called a diverging lens.
A concave lens will disperse light and make an image
that is always virtual, upright and smaller than the object.

     Links      Waves      Light      Revision Questions     

gcsescience.com       Physics Quiz       Index       Lens Quiz       gcsescience.com

Home      GCSE Chemistry      GCSE Physics

Copyright © 2015 gcsescience.com. All Rights Reserved.