A light source of wavelength \( \lambda \) illuminates a metal surface and electrons are ejected with maximum kinetic energy of \( 2\,\text{eV} \). If the same surface is illuminated by a light source of wavelength \( \frac{\lambda}{2} \), then the maximum kinetic energy of ejected electrons will be: (The work function of metal is \( 1\,\text{eV} \))
