A speaker emits a sound wave of frequency `f_(0)`. When it moves towards a stationary observer with speed u, the observer measures a frequency `f_(1)`. If the speaker is stationary, and the observer moves towards it with speed u, the measured frequency is `f_(2)`. Then -

Options

A. `f_(1) = f_(2) lt f_(0)`
B. `f_(1) gt f_(2)`
C. `f_(1) lt f_(2)`
D. `f_(1) = f_(2) gt f_(0)`

Answer

B