A photon of energy hv is absorbed by a free electron of a metal with work-function hv − φ.
(a) The electron is sure to come out.
(b) The electron is sure to come out with kinetic energy hv − φ.
(c) Either the electron does not come out or it comes our with kinetic energy hv − φ.
(d) It may come out with kinetic energy less than hv − φ.
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Answer:option D
Explanation:
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A photon of energy hv is absorbed by a free electron of a metal with work-function hv − φ, which is it may come out with kinetic energy less than hv − φ.
Explanation:
- There will be a collision of light’s photons on the free electrons when there is an incidence of light on the metal surface.
- To the free electron, a photon can give energy in some cases. There will be two possibilities, when the metal’s work-function is less than the energy.
- With kinetic energy hv – φ, the electron can come out from the metal. Or, on collision, there could be the loss in energy and the kinetic energy will have less than hv − φ.
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