Q.A photon of wavelength $4 \times 10^{-7} \text{ m}$ strikes on metal surface, the work function of the metal being $2.13 \text{ eV}$. The kinetic energy of the emission is: (Given: $h = 6.63 \times 10^{-34} \text{ J s}$, $1 \text{ eV} = 1.6 \times 10^{-19} \text{ J}$)