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Threshold frequency of a metal is 5 x 1013 s-1 upon which 1 x 1014 s-1 frequency light is focused. Then the maximum kinetic energy of emitted electron is

(a) 3.3 x 10-21 J

(b) 3.3 x 10-20 J

(c)  6.6 x 10-21 J

(d)  6.6 x 10-20 J

1 Answer

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Best answer

Correct option (b) 3.3 x 10-20 J

Explanation:

Following the conservation of energy principle,

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