| ⇦ | 
| ⇨ |
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: - A radiactive substance emits 100 beta particles in the first 2s and 50 beta
- If sound wave travel from air to water, which of the following remains unchanged?
- An aicraft executes a horizontal loop of radius 1 km with a speed of 900 kmh⁻¹
- A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
- A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A radiactive substance emits 100 beta particles in the first 2s and 50 beta
- If sound wave travel from air to water, which of the following remains unchanged?
- An aicraft executes a horizontal loop of radius 1 km with a speed of 900 kmh⁻¹
- A thin wire of resistance 4 ohm is bent to form a circle. The resistance across
- A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
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