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:

  1. (c) K.E. of emitted electron is smaller than the incident photon.

K.E of emitted electron =huhu0 where hu0= 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.



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