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Reflection from an Open End

A listener is...

Question

A listener is at rest with respect to the source of sound. A wind starts blowing along the line joining the source and the observer. Which of the following quantities do not change?

A

Frequency

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B

Velocity of sound

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C

Wavelength

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D

Time period

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Solution

The correct options are
B Time period
C Frequency
Frequency and time period do not change if wind blows along the line joining from the source and observer.
Since, $v = f λ$

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