Question

What causes light waves to refract?

A) The speed of light is reduced to zero.
B) The speed of light remains constant.
C) The light is repelled by some materials.
D)The speed of light changes from one medium to the next.

Answer 1

D is the right answer

Answer 2

The speed of light Never goes to 0. A is wrong.

The speed of light in refraction does not remain constant. B is incorrect

Light does not repel. That term is reserved for something like magnetism. C is not using the correct vocabulary.

D is the right answer.