Question

The work function of sodium metal is 4.41 × 10^-19 J. If the photons of wavelength 300 nm are incident on the metal, the kinetic energy of the ejected electrons will be (h = 6.63 x 10^–34 Js; c = 3 × 10⁸ m/s) ........ × 10^–21 J

Answer 1

E = W + K·E_max 

K·E_max = E – W