If the refractive index of crown glass is 1.51, its critical angle is?
A
48.6°
B
22.5°
C
41.5°
D
45.0°
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Sin c = (1)/n
= (1)/1.51 = 0.6622
∴ c = sin-\(^1\) 0.6622 = 41.47
Source: WAEC / JAMB / NECO Classroom Archive (Record #14215)