Question

Two vibrating tuning forks produce progressive waves given by y1=4sin500πTand y2=2sin506πTt Number of beats produced per minute is

Answer 1

Let the speed of Sound be v.

Beat Frequency = 30/3 = 10 Hz (1)

But Beat Frequency = | f1 - f2 | (2)

Since fλ = v

f1 = v/5

f2 = v/6

from (1) and (2)

|v/5 - v/6| = 10

v = 300 m/s