- 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: Particle Nature of Light |
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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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
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