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A wave has velocity u in medium P and ve...

A wave has velocity u in medium P and velocity 2 u in medium Q . If the wave is incident in medium P at an angle of `30^(@)` then the angle of refraction will be

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
`v = (sin i)/(sin r)=(v_(1))/(v_(2))`
`implies " "sinr = sin 30^(@)xx(2v)/(v)`
`implies " "sinr = (1)/(2)xx2xx1`
`implies " "r = 90^(@)`
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