Two potons of energy 2.5eV each are inci...

Two potons of energy `2.5eV` each are incident on a metal plate whose work function is `4.0eV`, then the number of emitted from the metal surface will be

A

1

B

2

C

more than 2

D

none of these

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The correct Answer is:

D

Energy of falling photon is less than threshold energy of metal. So, photoelectric effect does not take place.

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