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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
- Light of wavelength λᴀ and λᴃ falls on two identical metal plates A and B respectively.
- The magnetic lines of force inside a bar magnet
- Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line
- Two wires of the same dimensions but resistivities p1 and p2 are connected in series
- An alternating electric field, of frequency v, is applied across the dees (radius = R)
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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