If the refractive index of a medium in air is 2.0, what is the critical angle for this medium?
A
30o
B
42o
C
45o
D
50o
Verified Correct Answer: A.
Physical Principles & Numerical Solution
sin c = \(\frac{1}{n}\) = \(\frac{1}{2}\)
c = sin-1\((\frac{1}{n})\)
= 30o
Source: Myschool Past Questions Archive (Record #28094)