| ⇦ | 
| ⇨ |
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 particle executing simple harmonic motion has a kinetic energy K₀cos²ωt.
- In a mass spectrometer used for measuring the masses of ions, the ions
- Energy in a current carrying coil is stored in the form of
- An electric charge 10⁻³ μC is placed at the origin (0,0) of X-Y co-ordinate system.
- A comb run through one’s dry hair attracts small bits of paper. This is due to
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The particle executing simple harmonic motion has a kinetic energy K₀cos²ωt.
- In a mass spectrometer used for measuring the masses of ions, the ions
- Energy in a current carrying coil is stored in the form of
- An electric charge 10⁻³ μC is placed at the origin (0,0) of X-Y co-ordinate system.
- A comb run through one’s dry hair attracts small bits of paper. This is due to
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply