The sound from a single source can reach point O by two different paths. One path is 20.0 m long and the second path is 21.0 m l
ong. The sound destructively interferes at point O. What is the minimum frequency of the source if the speed of sound is 340 m/s?
1 answer:
Answer:
minimum frequency = 170 Hz
Explanation:
given data
One path long = 20 m
second path long = 21 m
speed of sound = 340 m/s
solution
we get here destructive phase that is path difference of minimum
here λ is the wavelength of the wave
so path difference will be
21 - 20 =
λ = 2 m
and
velocity that is express as
velocity = frequency × wavelength .............1
frequency =
minimum frequency = 170 Hz
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