A tuning fork makes $256$ vibrations per second in air. When the speed of sound is $330 m / s$ , the wavelength of the note emitted is :

0.56 m

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0.89 m

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1.11 m

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1.29 m

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Solution

The correct option is D $1.29 m$
The relation between the speed, wavelength and frequency of the sound is given as:
$v = n λ$
So, the wavelength is given as:
$\Rightarrow λ = \frac{v}{n}$

Given, $v = 330 m / s$
Since, frequency is defined as the number of vibrations per second
Hence, $n = 256$

$λ = \frac{330}{256} = 1.29 m$

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A tuning fork makes 256 vibrations per second in air. When the velocity of

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