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GUJCET · Physics · Dual Nature of Radiation and Matter
Monochromatic light of frequency \(6 \times 10^{14}\) Hz is produced by a laser. The power emitted is \(4 \times 10^{-3} W\). How many photons per second on an average are emitted by the source? \(\left[h=6.63 \times 10^{-34} Js \right]\)
- A \(1 \times 10^{16}\) Photons per second
- B \(5 \times 10^{16}\) Photons per second
- C \(3 \times 10^{15}\) Photons per second
- D \(5 \times 10^{15}\) Photons per second
Answer & Solution
Correct Answer
(A) \(1 \times 10^{16}\) Photons per second
Step-by-step Solution
Detailed explanation
\(N = \frac{P}{hf}\) \(N = \frac{4 \times 10^{-3} W}{(6.63 \times 10^{-34} Js) \times (6 \times 10^{14} Hz)}\)
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