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Monochromatic light of frequency 6.0 x 10¹⁴ Hz is produced by a laser. The power emitted is 2 x 10⁻³ ?. The number of photons emitted, on the average, by the sources per second is
Options
(a) 5 x 10¹⁶
(b) 5 x 10¹⁷
(c) 5 x 10¹⁴
(d) 5 x 10¹⁵
Correct Answer:
5 x 10¹⁵
Explanation:
Since P = nhv
n = p/hv = 2 x 10⁻³ / 6.6 x 10⁻³⁴ x 6.0 x 10¹⁴
= 5 x 10¹⁵
Related Questions: - The physical quantities not having same dimensions are
- Ice is wrapped in black and white cloth. In which cases more ice will melt
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The physical quantities not having same dimensions are
- Ice is wrapped in black and white cloth. In which cases more ice will melt
- A string in musical instrument is 50 cm long and its fundamental frequency is 800 Hz.
- The numebr 0 (zero) is required for
- A thin ring of radius R meter has charge q coulomb uniformly spread on it
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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