Question

A source of wave produces 40 crests and 40 troughs in 0.4 sec. find the frequency

Answer 1

Answer:

I think that this is the question of physics

Answer 2

Answer:

100 hz

Explanation:

F = Wavelength / time

Wavelength = 1 crest + 1 trough

No. Of wavelengths = 40

[As there are 40 crests and 40 troughs]

Time = 0.4s

Therefore ,

F= 40 / 0.4 hz

F = 40 × 10 / 4 hz

F = 10 × 10 [ 40/4 = 10]

F = 100 hz Ans.

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