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(a) Work function is defined as the minimum energy needed to make the electron free from the atom.

(b) Photoelectric effect can take place if light has been incident on a free electron

(c) Photon works on the principle of all or nothing while energy transfer.

(d) All of the above
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Ans : (c)
Work function is defined as the minimum energy needed to make the
electron free from the metal, not the atom.
Photoelectric effect is not at all possible with free electron.

 

answered Dec 27, 2013 by thanvigandhi_1
edited Mar 13, 2014 by thanvigandhi_1
 

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