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A prism of glass (mu=1.5) is dipped in t...

A prism of glass `(mu=1.5)` is dipped in to water as shown in the figure. If the refractive index of water is 4/3, then the incident ray will be totally reflected if

A

`sin theta gt 8/9`

B

`sin theta lt 8/9`

C

`sin theta=9/8`

D

`sin theta =8/9`

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The correct Answer is:
A
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