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Question
PQR is a right angled prism with other angles as 60o and 30o. Refractive index of prism is 1.5. PQ has a thin layer of liquid. Light falls normally on the face PR. For total internal reflection, maximum refractive index of liquid is
- 1.4
- 1.3
- 1.2
- 1.6
The correct answer is: 1.3
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