PW Solutions
A stationary observer receives sound from two identical turning forks, one of which approaches and the other one recedes with the same speed (much less that the speed of sound). The observer hears 2 beats / sec. The oscillation frequency of each retuning fork is v_0=1400 Hz and the velocity of sound in air is 350 m / s. The speed of each tuning fork is close to :
[JEE Main-2020 (January)]
(1) 1/4 m / s(2) 1/2 m / s
(3) 1 m / s
(4) 1/8 m / s
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