Spectra of hotter black bodies peak (i.e., have their highest brightness) at Shorter wavelengths than spectra of colder black bodies.
We know from the black body radiation,
As the temperature of the blackbody increases, the peak wavelength decreases (Wien's Law).
The intensity (or flux) at all wavelengths increases as the temperature of the blackbody increases.
Also we can say that blackbody has emitted more energy in two ways, It can emit more photons, or it can emit photons with more energy.
Photons of a shorter wavelength has more energy stored in it.
So, when the temperature of the blackbody increases blackbody has emitted photons which has shorter wavelength.
From the above discussion we can conclude that the above statement is correct. Spectra of hotter black bodies peak (i.e., have their highest brightness) at Shorter wavelengths than spectra of colder black bodies.
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