A photon of energy hv is absorbed by a free

Asked by admin @ 04/08/2021 in Chemistry viewed by 267 People

A photon of energy hu is absorbed by a free electron of a metal having work function w<hv. Then

(A) The electron is sure to come out(B) The electron is sure to come out with a kinetic energy (hv - W)C) Either the electron does not come out or it comes with a kinetic energy (hv-W) D) it may come out with a kinetic energy less than (hv - W)

Answered by admin @ 04/08/2021

answer : option (B) The electron is sure to come out with a kinetic energy (hv - W).

explanation : according to photoelectric theory, if a beam of light of a specific frequency is struck in the metal surface, electron ejects from the surface and ejected electrons have some kinetic energy.

means, if energy of incident photon , E = hv and threshold energy = w, where hv > w then, kinetic energy of emitted photon = hv - w.

so, option (B) is correct , The electron is sure to come out with a kinetic ene6 (hv - w).

A photon of energy hv is absorbed by a free

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