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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.
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Topics: Wave Optics
(101)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If, an electron in hydrogen atom jumps from an orbit of level n=3 to an orbit
- If M (A; Z), Mₚ and Mₙ denote the masses of the nucleus AZ X, proton
- Two waves are represented by the equations y₁ = a sin (?t + kx + 0.57) m
- An a.c. supply gives 30 volt r.m.s which passes through a 10Ω resistance.
- A charged particle enters a uniform magnetic field with a certain speed at right angles
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