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Question

What will be the energy of one photon of radiation whose frequency is 5×1014Hz?

A
199.51J
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B
3.3×1019J
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C
6.626×1034J
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D
2.31×105J
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Solution

The correct option is B 3.3×1019J
The energy of one photon is given by the expression, E=hν

where, h=6.626×1034Js and ν=5×1014s1

E=6.626×1034×5×1014=3.313×1019J

Hence, option B is correct.

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