SAT Subject Physics Practice Question 175: Answer and Explanation

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Question: 175

21. A light wave, traveling at 3 × 108 m/s has a frequency of 6 × 1015 Hz. What is its wavelength?

A. 5 × 10–8 m
B. 2 × 10–7 m
C. 5 × 10–7 m
D. 5 × 10–6 m
E. 2 × 107 m

Correct Answer: A

Explanation:

We use the equation that relates wavelength, frequency, and wave speed

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