Question

select the correct answer.
what causes light rays to bend in a new medium?
a. change in velocity
b. change in amplitude
c. change in frequency
d. constructive interference

Explanation:

When light enters a new medium, refraction (bending) occurs. The key factor is the change in velocity of light. The speed of light differs in different media (e.g., slower in water than in air). Amplitude change relates to intensity, frequency of light remains constant when moving between media (as it's determined by the source), and constructive interference is about wave superposition, not refraction. So the cause of light bending is the change in velocity.

Answer:

A. change in velocity