Velocity of sound in air is 330 m/s while in water is 1485 m/s. Assuming snell’s law to be applicable for sound also, answer the following question.
(i) A plane progressive sound wave is traveling making an angle that 10° with vertical and hits water surface. Angle that velocity of sound will make with vertical inside water is: (sin10° = 0.1736)
Text Solution
Verified by ExpertsCHECK THE SOLUTION
(i)
Sol. 
= 
⇒ sin r = 
sin i 1
[v 1 = Velocity of sound in air
i 1 = Angle of incidence in air]
= 0.78
(ii)
Sol.
Critical angle
sin θ C = 
Required distance
= h tan θ C = 91.2 cm
(iii)
Sol. Air bubble will converge the sound wave as it passes through it.
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