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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
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Radius of a soap bubble is increased from R to 2R. Work done in this process
- The electric field in a certain region is given by E=5i ̂-3ĵ kV/m. The potential
- A particle of mass 1.96×10⁻¹⁵ kg is kept in equilibrium between two horizontal metal
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- Two spherical nuclei have mass numbers 216 and 64 with their radii R₁ and R₂,
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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