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The work function of aluminium is 4.2 eV. If two photons each of energy 3.5 eV strike an electron of aluminium, then emission of electron will
  • a)
    depend upon the density of the surface
  • b)
    possible
  • c)
    not possible
  • d)
    None of these
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
The work function of aluminium is 4.2 eV. If two photons each of ener...
Work function of aluminium is 4.2 eV. The energy of two photons can not be added at the moment photons collide with electron all its energy will be dissipated or wasted as this energy is not sufficient to knock it out. Hence emission of electron is not possible.
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The work function of aluminium is 4.2 eV. If two photons each of energy 3.5 eV strike an electron of aluminium, then emission of electron willa)depend upon the density of the surfaceb)possiblec)not possibled)None of theseCorrect answer is option 'C'. Can you explain this answer?
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