| ⇦ | 
| ⇨ |
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 coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is
- A body is hangfing from a rigid support by an inextensible string of length
- α- particles, β – particles and γ – rays are all having same energy.
- A body, which emits radiations of all possible wavelengths, is known as
- Amout of heat required to raise the temperature of a body through 1 K is called its
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The coefficient of performance of a Carnot refrigerator working between 30⁰C and 0⁰C is
- A body is hangfing from a rigid support by an inextensible string of length
- α- particles, β – particles and γ – rays are all having same energy.
- A body, which emits radiations of all possible wavelengths, is known as
- Amout of heat required to raise the temperature of a body through 1 K is called its
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