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Intuition of Beats

A tuning fork...

Question

A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4 m/s. Then the number of beats heard by a stationary listener between direct and reflected sounds will be (velocity of sound in air is 340 m/s)

A

5

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B

7

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C

10

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Solution

The frequency of direct and reflected sound is same.

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Q. A tuning fork producing sound of frequency

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is moving towards a wall with a velocity of

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Q. A tuning fork of frequency 380 Hz is moving towards a wall with a velocity of 4 m/s. Then the number of beats heard by a stationary listener between direct and reflected sounds will be (velocity of sound in air is 340 m/s)

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