Aditi Chauhan
Last Activity: 10 Years ago
Hello Student,
Please find the answer to your question
The apparent frequency from tuning fork T1 as heard by the observer will be
v1 = c/c – v x v . . . . . . . . . . . . . . . . . . . . . . . (i)
where c = velocity of sound
v = velocity of turning fork
The apparent frequency from tuning fork T2 as heard by the observer will be
v2 = c/c + v x v . . . . . . . . . . . . . . . . . (ii)
Given v1 – v2 = 3
∴ c x v [1/c – v – 1/ c + v] = 3 or, 3 = c x v x 2v/c2 – v2
Since, v < < c ∴ 3 = c x v x 2v/c2
∴ v = 3 x 340 x 340/340 x 340 x 2 = 1.5 m/s
Thanks
Aditi Chauhan
askIITians Faculty
