Monochromatic radiation of wavelength $\mathrm{\lambda }$₁ = 3000 Å falls on a photocell operating in saturation mode. The corresponding spectral sensitivity of photocell is J = 4.8 mA/W (Spectral sensitivity means the total charge emitted per Joule). When another monochromatic radiation of wavelength $\mathrm{\lambda }$₂ = 1650 Å and power P = 5 mW is incident, it is found that maximum kinetic energy of photoelectrons increases to n = 4 times. Assume that efficiency of photo-electron generation per incident photon to be same for both the
cases.