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The frequency of light ray having the wavelength 3000Å is
Options
(a) 9×10¹³ cycle/sec
(b) 10¹⁵ cycle/sec
(c) 90 cycle/sec
(d) 3000 cycle/sec
Correct Answer:
10¹⁵ cycle/sec
Explanation:
n = v / λ = 3 × 10⁸ / 3000 × 10⁻¹° = 10¹⁵ cycle/sec.
Related Questions: - The r.m.s speed of the molecules of a gas in a vessel is 400 m/s
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The r.m.s speed of the molecules of a gas in a vessel is 400 m/s
- Two parallel long wires carry currents i₁ and i₂ with i₁ > i₂ .
- Light of wavelength λᴀ and λᴃ falls on two identical metal plates A and B respectively.
- A mass of 2.0 kg is put on a flat plan attached to a vertical spring fixed on the ground
- A body revolved around the sun 27 times faster than the earth. What is the ratio
Topics: Wave Optics (101)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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Answer is wrong. should be 10(to power 17)/s