If the refractive index of glass is 1.5, what is the critical angle at the air-glass interface?
A
sin-1\(\frac{1}{2}\)
B
sin-1\(\frac{2}{3}\)
C
sin-1\(\frac{3}{4}\)
D
sin-1\(\frac{8}{9}\)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
sin ic \(\frac{1}{n}\) = \(\frac{1}{1 - 5}\)
i = sin-1\(\frac{1}{1 - 5}\)
= sin-1\(\frac{10}{15}\)
= sin-1\(\frac{2}{3}\)
Source: Myschool Past Questions Archive (Record #28525)