If the refractive index of a medium in air is 2.0, what i...
If the refractive index of a medium in air is 2.0, what is the critical angle for this medium?
30o
42o
45o
50o
Correct answer is A
sin c = \(\frac{1}{n}\) = \(\frac{1}{2}\)
c = sin-1\((\frac{1}{n})\)
= 30o
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