A light ray is incident perpendicular to a face of a 90∘ prism and is totally internally reflected at the glass – air interface. If the angle of reflection is 45∘, what can be concluded about the refractive index n?
A
n<1√2
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B
n<√2
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C
n>1√2
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D
n>√2
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Solution
The correct option is Dn>√2 Us ethe concepts of TIR and critical angle and find the answer to be n>√2. watch the next video for detailed solution