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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
- If h is the height of the capillary rise and r be the radius of capillary tube,
- Oil spreads over the surface of water where as water does not spread
- An avarage induced e.m.f. of 1 V appears in a coil when the current in it is changed
- One-fourth length of a spring of force constant K is cut away. The force constant
- In an L-C-R series resonant circuit, the capacitance is changed from C to 4C.
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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