Front

What does the law of reflection state?

Back

The angle of incidence is equal to the angle of reflection.

Front

What direction does a ray of light bend when entering a more optically dense material?

Back

Towards the normal.

Front

Describe a convex lens.

Back

A convex lens is thicker in the middle than on the edges.

Front

What happens to the wavelength of light when it travels from a vacuum into glass?

Back

The wavelength decreases.

Front

What is the shape of a convex lens?

Back

A convex lens is typically biconvex, meaning it is curved outward on both sides.

Front

What is the focal point of a lens?

Back

The focal point is the point where parallel rays of light converge after passing through the lens.

Front

What is the difference between a convex lens and a concave lens?

Back

A convex lens converges light rays, while a concave lens diverges them.

Front

What is refraction?

Back

Refraction is the bending of light as it passes from one medium to another with a different density.

Front

What is the formula for calculating the focal length of a lens?

Back

The lens formula is 1/f = 1/v - 1/u, where f is the focal length, v is the image distance, and u is the object distance.

Front

What is the significance of the principal axis in lens diagrams?

Back

The principal axis is the line that passes through the center of the lens and is perpendicular to its surfaces.