A plane wave of sound traveling in air is inc | vedclass

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(C) According to Snell's law,$\frac{\sin i}{\sin r} = \frac{v_1}{v_2}$,where $v_1 = 300 \ m/s$ (air) and $v_2 = 600 \ m/s$ (liquid).Given $i = 60^{\ci

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The wave will reflect back into air.

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(C) According to Snell's law,$\frac{\sin i}{\sin r} = \frac{v_1}{v_2}$,where $v_1 = 300 \ m/s$ (air) and $v_2 = 600 \ m/s$ (liquid).Given $i = 60^{\circ}$,the critical angle $C$ is defined as $\sin C = \frac{v_1}{v_2} = \frac{300}{600} = 0.5$.Thus,$C = \sin^{-1}(0.5) = 30^{\circ}$.Since the angle of incidence $i = 60^{\circ}$ is greater than the critical angle $C = 30^{\circ}$,the sound wave undergoes total internal reflection.Therefore,the wave will reflect back into the air.

$A$ plane wave of sound traveling in air is incident upon a plane surface of a liquid. The angle of incidence is $60^{\circ}$. The speed of sound in air is $300 \ m/s$ and in the liquid it is $600 \ m/s$. Assume Snell's law to be valid for sound waves.

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