- 1(current)
Q. No.A monochromatic source of light emits \(50~\text{W}\) at a wavelength of \(400~\text{nm}\). The number of photons emitted per second is approximately (Take \(\text{hc} = 1240~\text{eV-nm}\)):
1. \(10^{20}\)
2. \(10^{25}\)
3. \(10^{30}\)
4. \(10^{40}\)
1. \(10^{20}\)
2. \(10^{25}\)
3. \(10^{30}\)
4. \(10^{40}\)
Subtopic: Â Particle Nature of Light |
 82%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
The work function of cesium is \(2.14\) eV. The threshold frequency for cesium is:
1. \(5.03\times10^{12}\) Hz
2. \(6.12\times10^{14}\) Hz
3. \(5.16\times10^{14}\) Hz
4. \(6.51\times10^{12}\) Hz
1. \(5.03\times10^{12}\) Hz
2. \(6.12\times10^{14}\) Hz
3. \(5.16\times10^{14}\) Hz
4. \(6.51\times10^{12}\) Hz
Subtopic: Â Particle Nature of Light |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Which one among the following shows the particle nature of light?
1. Photoelectric effect
2. Interference
3. Refraction
4. Polarisation
Subtopic: Â Particle Nature of Light |
 90%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Two photons have:
| 1. | equal wavelengths have equal linear momenta. |
| 2. | equal energies have equal linear momenta. |
| 3. | equal frequencies have equal linear momenta. |
| 4. | equal linear momenta have equal wavelengths. |
Subtopic: Â Particle Nature of Light |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Let \(n_r\) and \(n_b\) be respectively the number of photons emitted by a red bulb and a blue bulb of equal power in a given time. Then:
| 1. | \(n_r=n_b\) |
| 2. | \(n_r<n_b\) |
| 3. | \(n_r>n_b\) |
| 4. | the information is insufficient to get a relation between \(n_r\) and \(n_b\) |
Subtopic: Â Particle Nature of Light |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.