Question

Light travels in two media A and B with speeds 1.8 × 10⁸ ms⁻¹ and 2.4 × 10⁸ ms⁻¹ respectively. Then the critical angle between them is:

Options

• `sin^-1 (2/3)`

• `tan^-1 (3/4)`

• `tan^-1 (2/3)`

• `sin^-1 (3/4)`

Answer 1

`sin^-1 (3/4)`