A point source is emitting sound waves of int | vedclass

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Question

Correct answer is : $3$

We know for point source, $I \propto \frac{1}{r^2}=\frac{K}{4 \pi r^2}$

$r_1=2 m, r_2=4 m=2 r_1 $

$I_0=16 	imes 10^{

Vedclass · Accepted Answer

$3$

Vedclass · Answer

Correct answer is : $3$

We know for point source, $I \propto \frac{1}{r^2}=\frac{K}{4 \pi r^2}$

$r_1=2 m, r_2=4 m=2 r_1 $

$I_0=16 	imes 10^{-8} W / m ^2$

at $2 m$,

$I_1=\frac{I_0}{(2)^2}=\frac{16 	imes 10^{-8}}{4} $

$I_1=4 	imes 10^{-8} $

$ I_2=\frac{I_0}{4_2}=\frac{16 	imes 10^{-8}}{16}=10^{-8} $

$\left|I_2-I_1ight|=3 	imes 10^{-8} W / m ^2, x=3$

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