- 1(current)
Q. No.Monochromatic light of frequency \(6.0 \times 10^{14}~\text{Hz}\) is produced by a laser. The power emitted is \(2.0\times 10^{-3}~\text{W}.\) How many photons per second, on average, are emitted by the source?
1. \(6\times 10^{15}\)
2. \(5\times 10^{14}\)
3. \(6\times 10^{14}\)
4. \(5\times 10^{15}\)
Subtopic: Â Particle Nature of Light |
 71%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
Links
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
The work function of cesium is \(2.14 ~\text{eV}.\) The threshold frequency for cesium is:
| 1. | \(5.03\times10^{12}~\text{Hz}\) | 2. | \(6.12\times10^{14}~\text{Hz}\) |
| 3. | \(5.16\times10^{14}~\text{Hz}\) | 4. | \(6.51\times10^{12}~\text{Hz}\) |
Subtopic: Â Particle Nature of Light |
 73%
From NCERT
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
Links
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
- 1(current)
Q. No.
© 2025 GoodEd Technologies Pvt. Ltd.