SAT Subject Physics Practice Question 426: Answer and Explanation

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Question: 426


Which set of pulses will soon show destructive interference?

A. A
B. B
C. C
D. D
E. E

Correct Answer: E


The correct answer is (E). When the two pulses are located at the same point they will algebraically add the positive peak to the negative peak yielding no wave or disturbance. They have destroyed one another at that spot.

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