Lenses.

Front

What is a convex lens?

Back

A convex lens is a lens that is curved on both sides, thicker in the middle, and thinner at the edges. It converges light rays that pass through it.

Front

What is a concave lens?

Back

A concave lens is a lens that is curved inward, thinner in the middle, and thicker at the edges. It diverges light rays that pass through it.

Front

What type of lens is used in cameras?

Back

A camera uses a convex lens to focus light and capture images.

Front

What type of lens is used in peepholes?

Back

A peephole uses a concave lens to allow a wider view while maintaining privacy.

Front

Which lens is used in glasses for nearsightedness?

Back

Glasses for nearsightedness typically use concave lenses to diverge light before it enters the eye.

Front

What is the primary function of a convex lens?

Back

The primary function of a convex lens is to converge light rays to a focal point.

Front

What is the primary function of a concave lens?

Back

The primary function of a concave lens is to diverge light rays, spreading them out.

Front

Name an application of concave lenses.

Back

Concave lenses are used in devices like flashlights and some types of telescopes.

Front

What happens to light rays when they pass through a convex lens?

Back

Light rays converge to a point after passing through a convex lens.

Front

What happens to light rays when they pass through a concave lens?

Back

Light rays diverge and spread out after passing through a concave lens.