SAT Subject Physics Practice Question 491: Answer and Explanation

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Question: 491

7. Which of the following is/are uses for polarized light waves?

I. Sunglasses

II. Remove ultraviolet light

III. Reveal stress patterns

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

Correct Answer: C


The correct answer is (C). Polarizers are used in industry to reveal stress patterns in machinery and tools. Almost everyone has used sunglasses that protect their eyes by polarizing the light to reduce glare.

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