A light of wavelength `3540 A^o` falls on a metal having work function of `2.5eV`. The ejected electron collides with another target metal inelastically and its total kinetic energy is utilized to raise the temperature of target metal. The mass of target metal is `10^(-3) kg` and its specific heat is `160 j kg^-1 overset(o)C^(-1)`).` If `10^(18)` electrons are ejected per second, then find the rate of raise of temperature `overset(o)C` of the metal. (Assume there is no loss of energy of ejected electron by any other process, all the electron are reaching the target metal with maximum kinetic energy and `h c=12400eV A^o` )

Answer

1