Question

For photoelectric emission from certain metal the cut-off
frequency is v. If radiation of frequency 2v impinges on the
metal plate, the maximum possible velocity of the emitted
electron will be (m is the electron mass) [2013]
(a) √hv / m (b) √2hv / m
(c) 2 √hv / m (d) √hv / (2m

Answer 1

Answer:

I thought c option is correct answer

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Answer 2

The answer is

(b) √2hv / m

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