Consider an equilateral prism of refractive index $μ$ . It is found that when light is incident at an angle 60^o, angle of emergence is ‘e’, while when light is incident at an angle 50^o, it undergoes TIR on the 2nd refracting surface. Choose the CORRECT options:

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A ray incident at an angle 65^o, will surely emerge from other surface.

A ray incident at an angle of 50.7^o, will surely suffers TIR on other surface.

A ray incident at an angle of 59^o,may suffer TIR on the other surface.

A ray incident at an angle of 40^o,will surely suffer TIR on other surface.

answer is A, B, D.

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Detailed Solution

For angle of incidence of 60^o light emerge $\Rightarrow$ all rays having incident angle >60^o will emerge. For angle of incidence of 50^o, light suffers TIR $\Rightarrow$ all rays having angle of incidence < 50^o will surfer TIR. For rays between 50^o to 60^o as angle of incidence, nothing can be commented.

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