- 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: Particle Nature of Light |
Please attempt this question first.
Please attempt this question first.
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 |
Subtopic: Particle Nature of Light |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one among the following shows the particle nature of light?
| 1. | Photoelectric effect | 2. | Interference |
| 3. | Refraction | 4. | Polarisation |
Subtopic: Particle Nature of Light |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo 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. |
From NCERT
Subtopic: Particle Nature of Light |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLet \(n_r\) 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: Particle Nature of Light |
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
To view explanation, please take trial in the course below.
NEET 2025 - Target Batch
Please attempt this question first.
Launched MCQ Practice Books
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.