(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.

(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.

Class 11 Physics Waves and Sound Sound Waves (Longitudinal wave) and it’s Characteristics (Speed etc.)

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$A$ 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.

A
The wave will refract into liquid away from normal.
B
The wave will refract into liquid towards the normal.
C
The wave will reflect back into air.
D
None of these.

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Waves and Sound

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Sound Waves (Longitudinal wave) and it’s Characteristics (Speed etc.)

The ratio of the velocity of sound in hydrogen gas $(\gamma = 7/5)$ to that in helium gas $(\gamma = 5/3)$ at the same temperature is

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$A$ train,standing in a station yard,blows a whistle of frequency $400 \, Hz$ in still air. The wind starts blowing in the direction from the yard to the station with a speed of $10 \, m/s$. Given that the speed of sound in still air is $340 \, m/s$. Mark the $INCORRECT$ statement:

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Sound travels in rocks in the form of

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$A$ steel rod of length $100 \, cm$ is clamped at the middle. The frequency of the fundamental mode for the longitudinal vibrations of the rod is ..... $kHz$ (Speed of sound in steel $= 5 \, km \, s^{-1}$)

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The apparatus used to determine the velocity of sound in a gas is:

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$A$ 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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The ratio of the velocity of sound in hydrogen gas $(\gamma = 7/5)$ to that in helium gas $(\gamma = 5/3)$ at the same temperature is

$A$ train,standing in a station yard,blows a whistle of frequency $400 \, Hz$ in still air. The wind starts blowing in the direction from the yard to the station with a speed of $10 \, m/s$. Given that the speed of sound in still air is $340 \, m/s$. Mark the $INCORRECT$ statement:

Sound travels in rocks in the form of

$A$ steel rod of length $100 \, cm$ is clamped at the middle. The frequency of the fundamental mode for the longitudinal vibrations of the rod is ..... $kHz$ (Speed of sound in steel $= 5 \, km \, s^{-1}$)

The apparatus used to determine the velocity of sound in a gas is:

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