The power radiated by a black-body is $P_0$ and it radiates maximum energy around the wavelength ${\lambda }_0.$ If the temperature of the black-body is now changed so that it radiates maximum energy around a wavelength $\raisebox{1ex}{$3{\lambda }_0$}\!\left/ \!\raisebox{-1ex}{$4$}\right.$, then the power radiated by it will be