If the refractive index of crown glass is 1.51, its criti...
If the refractive index of crown glass is 1.51, its critical angle is?
48.6°
22.5°
41.5°
45.5°
Correct answer is C
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin-1 0.6622 = 41.47
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