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The frequency of a light wave in a material is 2 x 10¹⁴ Hz and wavelength is 5000Å. The refractive index of material will be
Options
(a) 1.5
(b) 3
(c) 1.33
(d) 1.4
Correct Answer:
3
Explanation:
By using v = nλ , n = 2 x 10¹⁴ Hz
λ = 5000Å = 5000 x 10⁻¹⁰ m
v = 2 x 10¹⁴ x 5000 x 10⁻¹⁰ = 10⁸ m/s
Refractive index of the material,
µ = c / v = 3 x 10⁸ / 10⁸ = 3
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
- If r be the distance of a point on the axis of a magnetic dipole from its centre
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
- The charges Q, +q, and +q are placed at the vartices of an equilateral
- An object is 8 cm high. It is desired to form a real image 4 cm high at 60 cm from
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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