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  4. Pressure variation in a mechanical wave depends upon as

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Q. Pressure variation in a mechanical wave depends upon as

Delhi UMET/DPMTDelhi UMET/DPMT 2008Electromagnetic Waves

Solution:

Amplitude of pressure variation
$p_{m}=B k A$
and intensity of wave $I \propto A^{2}$
So, $p_{m} \propto(I)^{1 / 2}$
ie, pressure variation $\propto$ (intensity) $^{1 / 2}$