SAT Subject Physics Practice Question 675: Answer and Explanation

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Question: 675

11. The reason an observer cannot detect the wave nature of a fast moving truck is

A. the momentum of the truck is too large.
B. the velocity of the wave is too large.
C. there are no waves to be detected.
D. the frequency is too low.
E. the wavelengths are too small.

Correct Answer: D


The correct answer is (D). The de Broglia wavelength cannot be detected because the objects in question have velocities that are too small for the waves they create to be detectable.

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