1. Tardigrade
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  4. The frequency of a man’s voice is 300 Hz and its wavelength is 1 meter. If the wavelength of a child’s voice is 1.5 m, then the frequency of the child’s voice is:

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Q. The frequency of a man’s voice is $300\, Hz$ and its wavelength is 1 meter. If the wavelength of a child’s voice is $1.5\, m$, then the frequency of the child’s voice is:

Waves

Solution:

$f_{1} \lambda_{1}= f_{2} \lambda_{2}$
$(300)(1)=\left(f_{2}\right)(1.5)$
$200\, Hz =f_{2}$