A wave on a stretched string is reflected from a fixed end P of the string. The phase difference, at P, between the incident and reflected waves is:
A) zero
B) $\pi$ rad
C) $\pi$/2 rad
D) depends on the velocity of the wave
E) depends on the frequency of the wave

Question

A wave on a stretched string is reflected from a fixed end P of the string. The phase difference, at P, between the incident and reflected waves is:
A) zero
B)  $\pi$ rad
C)  $\pi$/2 rad
D) depends on the velocity of the wave
E) depends on the frequency of the wave

Quizplus · Accepted Answer

When a wave is reflected from a fixed end, it undergoes a phase change of π radians (or 180 degrees).

A Wave on a Stretched String Is Reflected from a Fixed