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Question

An electron falls from one energy level to another; it releases a certain amount of light with a frequency of 5.100 x 1014 Hz. What energy is associated with this electron?


A

1.790 x 10-1kJ

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B

1.313 x 1022 J

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C

33.8 x 10-20 J

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D

3.379 x 10-19 kJ

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Solution

The correct option is C

33.8 x 10-20 J


E = h.v

= 6.63 x 10-34 x 5.1 x 1014

= 33.8 x 10-20 J


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