The diagram above illustrates two waves of equal amplitudes A and frequencies approaching each other....

WAEC 2017

The diagram above illustrates two waves of equal amplitudes A and frequencies approaching each other. When the two waves meet at a point I midway between them, the vertical displacement of the resulting wave will be

A. 0
B. \(\frac{A}{2}\)
C. \(\frac{A}{4}\)
D. \(2A\)

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Correct Answer: Option D

Explanation

This is a type of constructive interference. When two waves of equal amplitude are interfering constructively, the resulting amplitude is twice as large as the amplitude of an individual wave.

= A + A = 2A

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