Question

When the angle of incidence on the material is 60ŗ, the reflected light is completely polarised. The velocity of refracted ray inside the material is-

• A. 3 × 10⁸ m/s
• B. $\frac{3}{\sqrt{2}}$ × 10⁸ m/s
• C. $\sqrt{3}$ × 10⁸ m/s
• D. $\frac{1}{3}$ × 10⁸ m/s

Answer 1

Answer: (C)

$\sqrt{3}$ × 10⁸ m/s

Answer 2

µ = tan i_p \ $\frac{c}{v}$ = tan i_p

\ v = $\frac{3 \times 10^{8}}{\sqrt{3}}$ = $\sqrt{3}$ × 10⁸ m/s