Question

Under which condition will the angle of transmission always be the same as the angle of...

Under which condition will the angle of transmission always be the same as the angle of incidence?

A. When the acoustic of two media is equal.

B. When the angle of incidence is oblique.

C. When speed of sound in two media is equal.

D. When the density of two media is equal.

Science   Advanced-Physics   
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Answer #1

Let the light is travelling from medium I of refractive index n1 to the medium II of refractive index n2. Let the incidence angle is 'i' and angle of transmission is 'r'. Let the speed of sound in medium I and medium II v1 and v2 respectively.

using Snell's Law we can write,

we find incidence angle is 'i' and angle of transmission is 'r' will be same if

or We can say when i.e When speed of sound in two media is equal. Ans C

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