The resultant amplitude of two waves of equal amplitude becomes maximum when their…

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

The resultant amplitude of two waves of equal amplitude

A

becomes maximum when their phase difference

\theta

is (a)

\theta = \pi,\;3\pi,\;5\pi,\ldots

(b)

\theta = n\pi\;(n=0,1,2,\ldots)

(c)

\theta = 0,\;2\pi,\;4\pi,\ldots

(d)

\theta = \tfrac{\pi}{2},\;\tfrac{3\pi}{2},\;\ldots