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Reflection from an Open End

A source of s...

Question

A source of sound moves away with velocity of sound from a stationary observer. Then the frequency of sound heard by the observer

A

remains same

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B

is doubled

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C

is halved

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D

becomes infinity

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Solution

The correct option is C is halved
$f = (\frac{V}{V + V s}) f_{0}$

$V_{s} = V =$ velocity of sound

$∴ f = (\frac{V}{2 V}) f_{0}$

$f = \frac{f_{0}}{2}$

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