Five elements A,B,C,D and E have work functions 1.2eV, 2.4eV ,3.6eV, 4.8eV and 6eV respectively . If light of wavelength 4000Å is allowed to fall on these elements , then photo electrons are emitted by 2.4eV 3.6eV 4.8eV and 6eV respectively . If light of wavelength 4000Å is allowed to fall on these elements B [...]
