A light source of wavelength `lambda` illuminates a metal and ejects photoelectron with `(KE)^(max) = 1 eV.` Another light source of wave length `(lambda)/(3),` ejects photoelectrons from same metal with `(KE)^(max)=5 eV.` Find the value of work function (eV) of metal.
A
1 eV
B
2 eV
C
`0.5` eV
D
None of these
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