Sound waves traveling in air enters water at an angle i with the normal. It gets refracted at angle r with
i > r
r > i
i = r
Sound waves do not get refracted
A
Sound waves do not get refracted
B
r > i
C
i > r
D
i = r
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Solution
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When a sound wave goes from a medium to another medium , it is refracted due to difference in speed in two media . The angle of incidence i and angle of refraction r are related by Snell's law ,
sini/sinr=va/vw ,
we know sound travels faster in liquids than gases , therefore vw>va , and by Snell's law , r>i .
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