The minimum refractive index of the prism given below(see image) should be:

Asked by sumandeesinghrana | 12th Oct, 2010, 09:12: PM

Expert Answer:

Dear student
As in the figure we  see that light is getting total internally reflected at an angle of 45 which must be more than the critical angle for the glass-air interface.
 
Using
putting thetac = 45, we get mug = 1/sin 45 =
Hence the correct option is (b)
 
We hope your doubt is resolved.
 
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Team
Topperlearning

Answered by  | 13th Oct, 2010, 10:12: AM

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