Two coherent waves, each with amplitude A, are in phase as they overlap in a region of space. The amplitude of the superposed wave is
A) 0.
B) A.
C) 2A.
D) 3A.
E) 4A.

Question

Quizplus · Accepted Answer

When two waves of the same frequency and amplitude are in phase, the resulting wave has an amplitude equal to the sum of the individual amplitudes. Therefore, the amplitude of the superposed wave is 2A.

Two Coherent Waves, Each with Amplitude A, Are in Phase