If the refractive index of crown glass is 1 51 ... - JAMB Physics 2009 Question
If the refractive index of crown glass is 1.51, its critical angel is.
A
48.6°
B
22.5°
C
41.5°
D
45.0°
correct option: c
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin +0.6622 = 41.47
= (1)/1.51 = 0.6622
∴ c = sin +0.6622 = 41.47
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