Dual Nature of Radiation and Matter - Result Question 73
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77. A radio transmitter operates at a freqency 880 $kHz$ and a power of $10 kW$. The number of photons emitted per second is
======= ####77. A radio transmitter operates at a freqency 880 $kHz$ and a power of $10 kW$. The number of photons emitted per second is
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/dual-nature-of-radiation-and-matter/dual-nature-of-radiation-and-matter—result-question-73.md (a) $1.72 \times 10^{31}$
(b) $1.327 \times 10^{25}$
(c) $1.327 \times 10^{37}$
(d) $1.327 \times 10^{45}$
[1990]
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Answer:
Correct Answer: 77. (a)
Solution:
- (a) No. of photons emitted per sec,
$ \begin{aligned} n & =\frac{\text{ Power }}{\text{ Energy of photon }} \\ & =\frac{P}{h v}=\frac{10000}{6.6 \times 10^{-34} \times 880 \times 10^{3}} \\ & =1.72 \times 10^{31} \end{aligned} $
