Convex and Concave Lenses

Front

What is the name given to a lens formed by arranging two prisms with rectangular rough surfaces facing each other?

Back

Convex lens

Front

What happens to parallel rays incident on a convex lens?

Back

They converge at a point

Front

What is the center of the curvature of a convex lens called?

Back

Center of curvature

Front

What is the focal length of a lens?

Back

The distance between the optical center and the focal point

Front

Which lens has a shorter focal length, a thick lens or a thin lens?

Back

Thick lens

Front

What type of image is formed by a convex lens?

Back

Real image

Front

What can happen if you look directly at the Sun through a convex lens?

Back

The lens will heat up and burn

Front

What happens to parallel rays incident on a concave lens?

Back

They refract away from the center

Front

What is the name given to the point where divergent rays appear to meet after passing through a concave lens?

Back

Focal point

Front

What type of image is formed by a concave lens?

Back

Virtual image