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A beam of width t incident at 45^@ on an...

A beam of width t incident at `45^@` on an air-water boundary. The width of the beam is water is `......`

A

`(mu-1)t`

B

`mut`

C

`(sqrt(mu^2-1))/mu`

D

`((sqrt(2mu^2-1)))/mut`

Text Solution

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The correct Answer is:
D
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