Physics WAEC

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. A2
C. A4
D. 2A

Correct Answer: Option D

D. 2A

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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