Lenses

Front

What is a lens?

Back

A lens is a transparent optical device that refracts light to converge or diverge beams.

Front

What are the two main types of lenses?

Back

Concave and Convex lenses.

Front

What is a concave lens?

Back

A concave lens is a lens that diverges light rays that are incident on it.

Front

What is a convex lens?

Back

A convex lens is a lens that converges light rays that are incident on it.

Front

How does a concave lens affect light?

Back

It causes light rays to diverge.

Front

How does a convex lens affect light?

Back

It causes light rays to converge.

Front

What type of image does a concave lens produce?

Back

A virtual, upright image.

Front

What type of image does a convex lens produce when the object is beyond the focal point?

Back

A real, inverted image.

Front

What is the focal point of a lens?

Back

The point where parallel rays of light either converge or appear to diverge after passing through the lens.

Front

What happens to light rays that pass through the focal point of a convex lens?

Back

They emerge as parallel rays.