SAT Subject Physics Practice Question 590: Answer and Explanation

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Question: 590

1. The most notable difference between a radio wave and a light wave is

A. speed.
B. refractive index.
C. reflectivity.
D. amplitude.
E. frequency.

Correct Answer: E


The correct answer is (E). Both light and radio waves are electromagnetic radiation. The difference between the two is their frequency.

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