B-6.
A photon of energy hv is absorbed by a free electron of a metal having work function
(A) The electron is sure to come out
(B) The electron is sure to come out with a kinetic energy (hy-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)
Answers
Answered by
1
Answer:
(A) The electron is sure to come out
Answered by
1
Answer:
d) It may come out with a kinetic energy less than (hv - W)
Explanation:
According to the theory of photoelectrics, if any beam of light of a specific frequency is stuck in the metal surface, then the electron ejects from the surface. Thus, the ejected electrons gain some kinetic energy.
This means, that if energy of incident photon, is E = hv and the threshold energy = w,
where hv > w then, the kinetic energy of emitted photon will be = hv - w.
Therefore, if a photon of energy hv is absorbed by a free electron of a metal having work function, then It may come out with a kinetic energy less than (hv - W).
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