Light of wavelength 4000 A is incident on a metal plate work function is 2 eV What is maximum - Physics - Dual Nature of Radiation and Matter

Question

Light of wavelength 4000 A is incident on a metal plate work
function is 2 eV What is maximum kinetic energy of emitted
photoelectron? (1) 2 0 eV (2) 1 1 eV (4) 1 5 eV (3) 0 5 eV

Shobhit Mittal · Accepted Answer

work function ϕ=2 eV λ=4000 Amaximum KE=hcλ-ϕ=4
136*10-15*3*1084000*10-10-2=1
1 eV  is the maximum KE of the photo electron
Regards

Light of wavelength 4000 A is incident on a metal plate work function is 2 eV. What is maximum kinetic energy of emitted photoelectron? (1) 2.0 eV (2) 1.1 eV (4) 1.5 eV (3) 0.5 eV