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Standard XII

Physics

Deviation in Prism

A glass prism...

Question

A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach the face BC if

Sinθ > 8/9

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2/3 < sinθ < 8/9

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Sinθ < 2/3

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None of the above

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Solution

The correct option is A
Sinθ > 8/9

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A glass prism of refractive index 1.5 is immersed in water (refractive index 4/3). A light beam incident normally on the face AB is totally reflected to reach the face BC if

The correct option is A Sinθ > 8/9

The correct option is A
Sinθ > 8/9