Statement I: Intensity of sound wave changes when the listener moves towards or away from the stationary source.
Statement II: The motion of listener causes the apparent change in wavelength.

Options

A. Statement I is true, Statement II is true: Statement II is a correct explanation for statement I.
B. Statement I is true, Statement II is true, Statement II is NOT a correct explanation for Statement I.
C. Statement I is true, Statement II is false
D. Statement I is falce: Statement II is true

Answer

C

Explanation

Intensity of sound at any point is dependent upon frequency as well as amplitude. As due to Doppler effect the apparent frequency changes, so intensity as perceived by the listener also changes. When listener is moving wavelength remains the same.