NCERT Exercise 2.9 - Structure of Atom

Question: A 4 x 10^-7 m photon strikes a metal of work function 2.13 eV. Find photon energy, electron kinetic energy and speed.

Answer: Photon energy = 3.10 eV (4.97 x 10^-19 J); K.E. = 0.97 eV; speed = 5.84 x 10^5 m s^-1.

Full step-by-step NCERT solution with diagrams on Something by Zero.