Structure of Atom - Result Question 8
####8. In the photo-electron emission, the energy of the emitted electron is
(a) greater than the incident photon
[1994]
(b) same as than of the incident photon
(c) smaller than the incident photon
(d) proportional to the intensity of incident photon.
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Solution:
- (c) K.E. of emitted electron is smaller than the incident photon.
K.E of emitted electron $=hu-hu_0$ where $h u_0=$ work function.
[work function is the minimum energy required to remove an electron from the surface of the material.]
Energy of the incident photon $=$ hu maximum kinetic energy of the photoelectrons depend upon the frequency of the light not on the intensity of light.
