the pitch of a train horn decreases when it passes a railway crossing ? please answer fast it's urgent
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it happens because pitch depends on frequency and when a train passes by a stationary observer the wavelenght gradually increases and as we know
v=fA
A=wavelenght
and if A increases frequency decreases and so does pitch.
hope this helps
ShafaqQaisar:
I am asking about why does the pitch of the horn decreases when another train pass by
it can even increase
it depends whether the waves interfere constructively or destructively
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