Question

Two media A and B are separated by a plane boundary surface. The speed of light in medium A and B are 2 x 108 m/s and 2.5 x 108 m/s respectively. The critical angle for which a ray of light going from A to B will have total internal reflection is A

• A. $sin^{-1}(\frac{1}{3})$
• B. $sin^{-1}(\frac{4}{5})$
• C. $sin^{-1}(\frac{5}{4})$
• D. $sin^{-1}(1)$

Answer 1

Answer: (B)

$sin^{-1}(\frac{4}{5})$

Answer 2

The correct option is (B): $sin^{-1}(\frac{4}{5})$