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It is not possible for a photon to be co...

It is not possible for a photon to be completely absorbed by a free electron. Explain.

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The free electron in metal is bound by some restraining forces. Due to which it can not come out of its own. Some energy is to be spent in ejecting the free electron form the surface of metal which is equal to work function of metal. It means, some of the energy of the incident photon is spent in liberting the electron form the surface of metal and remaining energy of incident photon is used in imparting the K.E. to the emitted electron. As the maximum K.E. of the emitted photoelectron is less than the energy of incident photon, hence it is not possible for a photon to be completely absorbed by a free electron.
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PRADEEP-DUAL NATURE OF RADIATION AND MATTER-Exercise
  1. It is not possible for a photon to be completely absorbed by a free el...

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  2. The photoelectric effect can be explained on the basis of

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  3. Which of the following has minimum stopping potential?

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  4. When radiation is incident on a photoelectron emitter, the potential i...

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  5. Two photons, each of energy 2.5 eV are simultaneously incident on the ...

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  6. The maximum velocity of an electron emitted by light of wavelength lam...

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  7. The photoelectric work function for a metal surface is 4.125 eV. The c...

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  8. The slope of frequency of incident light and stopping potential for a ...

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  9. Threshold wavelength for a metal having work function w(0) is lambda. ...

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  10. The work function for metals A , B and C are respectively 1.92 eV , 2....

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  11. The wavelength of the matter wave is independent of

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  12. If E(1), E(2), E(3), E(4) are the respective kinetic energies of elect...

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  13. What is de-Broglie wavelength assciated with electron moving under a ...

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  14. The minimum energy required by an electron to..........form the metal ...

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  15. The maximum kinetic energy of emitted photoelectrons depends on the......

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  16. The ratio of number of photoelectrons ejected to the number of the pho...

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  17. For given photosenstive material, the photoelectric current is...........

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  18. An increase in the frequency of the incident light.............the vel...

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  19. The minimum energy required to ejected an electron from the surface of...

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  20. In photoelectric effect the energy of the free electron does not depen...

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  21. Photon is not a..........but it is a.......... .

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