Let, we are interested in only the radiation of frequency f. The energy of this mode can vary. But there will be a maximum limit. Is there any graphical representation that plots, maximum energy vs frequency?
The highest energy light a blackbody can radiate corresponds to the frequency fmax, which is determined by the blackbody's temperature T according to Wien's displacement law:
fmax=b.T/h
At this frequency, the energy of the emitted light is E=hfmax. As temperature increases, both the peak frequency and the emitted energy per photon increase.