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Q.

The energy of a photon of frequency 5 x 1017 s-1 is nearly

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a

33.125 X 10-17 J

b

33.125 X 1017 J

c

33.125 X 10-17 kJ

d

3.3125 X 10-17 J

answer is A.

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Detailed Solution

E = hv = 6.625 X 10-34 J -sec X 5 X 1017 /sec = 33.125 X 10-17 J
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The energy of a photon of frequency 5 x 1017 s-1 is nearly