14.Waves and Sound
normal

ઉદ્‍ગમથી $2m$ અને $3m$ અંતરે આવેલા બિંદુએ તીવ્રતાનો ગુણોત્તર કેટલો થાય?

A

$9 : 4$

B

$2 : 3 $

C

$3 : 2$

D

$4 : 9$

Solution

(a) Intensity $ \propto \frac{1}{{{{{\rm{(Distance)}}}^{\rm{2}}}}}$

==> $\frac{{{I_1}}}{{{I_2}}} = {\left( {\frac{{{d_2}}}{{{d_1}}}} \right)^2} = {\left( {\frac{3}{2}} \right)^2} = \frac{9}{4}$.

Standard 11
Physics

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