Two sources `S_1` and `S_2` of same frequency `f` emits sound. The sources are moving as shown with
Channel: Doubtnut
Date: 2020-01-19

Two sources `S_1` and `S_2` of same frequency `f` emits sound. The sources are moving as shown with speed `u` each. A stationary observer hears that sound. The beat frequency is (`v=`velocity sound)