Optics Question 825

Question: A triangular prism of glass is inside water. A ray, incident normally, on one of the faces, is totally reflected from face BC. Then the minimum refractive index of glass is -

Options:

A) 32

B) 53

C) 225

D) 423

Show Answer

Answer:

Correct Answer: D

Solution:

[d] For T.I.R. 45>C

sin45>sinC

12>4/3n

n>423



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