Navigate

When the angle of incidence is 60° on the surface of a glass slab, it is found

When the angle of incidence is 60° on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

Options

(a) √2 x 10⁸ m/s
(b) √3 x 10⁸ m/s
(c) 2 x 10⁸ m/s
(d) 3 x 10⁸ m/s

Correct Answer:

√3 x 10⁸ m/s

Explanation:

From Brewster’s law μ = tan iᴘ

c/v = tan 60° = √3

v=c / √3 = 3 × 10⁸ / √3

= √3 × 10⁸ m/sec

KA2007
admin:

Related Questions

  1. An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into
  2. In a circuit, the current lags behind the voltage by a phase difference of π/2.
  3. The height at which the weight of a body becomes 1/16 th, its weight
  4. A particle has initial velocity(3i⃗ +4j⃗)and has acceleration (0.4i⃗ +0.3j⃗)
  5. A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 secs