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CBSE Class 12-science Answered

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Asked by yugibo | 13 Apr, 2016, 10:54: PM
answered-by-expert Expert Answer
The work function Φ of the metal is given by 
Φ = hfo
where fo = threshold frequency of the metal below which no emission of electron is obtained.
Einstein's photoelectric equation is eV = Emax = hf - Φ
                                                        = hf - hfo = h (f - fo)
where Emax is the maximum kinetic energy of the electrons and V is the stopping potential for the electrons.
Therefore, eV1 = Emax = h (f - fo)
Hence, correct option is (c)
Answered by Yashvanti Jain | 15 Apr, 2016, 03:59: PM
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