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Time taken by light to cross a glass slab of thickness 4 mm and refractive index 3 is
Options
(a) 4×10⁻¹¹ sec
(b) 2×10⁻¹¹ sec
(c) 16×10⁻¹¹ sec
(d) 8×10⁻¹¹ sec
Correct Answer:
4×10⁻¹¹ sec
Explanation:
t = μx / c = (3 × 4 × 10⁻³) / (3 × 10⁸) = 4 x 10⁻¹¹ sec
Related Questions: - Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
- An electron in hydrogen atom makes a transition n₁ → n₂
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Thomson coefficient of a conductor is 10 µV/K. Its two ends are kept
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
- An electron in hydrogen atom makes a transition n₁ → n₂
- The angular velocity of second’s hand of a watch is
- Young’s modulus of perfectly rigid body material is
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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