KEmax=e×Vetarding = e × 0.6 = 0.6 eV Photon energy = hf = E When frequency increase by 10% energy of photon also increases by 10% New energy = E' = 1.1 E New KEmax.=e×Vretarding=e×0.9=0.9 eV Einstein photoelectric equation hf=KEmax+ϕ E=0.6+ϕ …(1) 1.1E=0.9+ϕ …(2) 1.1=