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Q.

A radio transmitter operates at a frequency of 880 kHz and a power of 10 kW. The number of photons emitted per second are

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a

$13 .27 \times 10^{34}$

b

$0 .075 \times 10^{- 34}$

c

$1 .72 \times 10^{31}$

d

$1327 \times 10^{34}$

answer is A.

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Detailed Solution

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Number of photons emitted per second

$n = \frac{p}{hv} = \frac{10 \times 10^{3}}{6 .6 \times 10^{- 34} \times 880 \times 10^{3}} = 1 .72 \times 10^{31}$

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