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A phot of energy h upsilon is absorbed b...

A phot of energy `h upsilon` is absorbed by a free electron of a metal having work function `phi lt h upsilon`

A

The electron is sure to come out

B

The electron is sure to come out with a kinetic energy `hv - phi`

C

Either the electron does not come out or it comes out with a kinetic energy `hv - phi`

D

It may come out with a kinetic energy less than `hv - phi`

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The correct Answer is:
A
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