A light source of wavelength `lambda` illuminates a metal and ejects photo-electrons with (K.E.)max=1 eV Another light source of wavelength `lambda/3` , ejects photo-electrons from same metal with (K.E.)max=4 eV Find the value of work function?

Options

A. 1eV
B. 2eV
C. 0.5eV
D. None of these

Answer

C