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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 wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
- Heat is flowing through a rod of length 50 cm and area of cross-section 5 cm².
- A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
- The potential difference applied to an X-ray tube is 5 kV and the current through it
- The diameter of the eye ball of a normal eye is about 2.5 cm. The power of the eye
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The wave function (in SI unit) for a light wave is given as Ψ(x,t)= 10³ sin π
- Heat is flowing through a rod of length 50 cm and area of cross-section 5 cm².
- A ray enters a glass sphere of refractive index μ=√3 at an angle of incidence of 60⁰
- The potential difference applied to an X-ray tube is 5 kV and the current through it
- The diameter of the eye ball of a normal eye is about 2.5 cm. The power of the eye
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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