SAT Subject Physics Practice Question 512: Answer and Explanation

Next steps

Question: 512

13. A light ray passes from a material of low refractive index to one of high refractive index. Which of the pairs of quantities listed below describes the light ray as it strikes and passes through the interface between the two materials? Match the descriptions below with the statement that best describes the situation.

The light ray inside the material with the higher index of refraction bends toward the normal.

A. The frequency of the wave increases.
B. The frequency of the wave decreases.
C. The velocity of the wave increases.
D. The velocity of the wave decreases.
E. Interference from reflected waves causes the light ray to refract.

Correct Answer: D

Explanation:

The correct answer is (D). The material with the higher index of refraction has a greater optical density to the light. The ray bends toward the normal when it slows down in the optically more dense material

Previous       Next