What is wien's law?

Wien's Law:

• Wien's Law tells us that objects of different temperature emit spectra that peak at different wavelengths.
• Hotter objects emit most of their radiation at shorter wavelengths; hence they will appear to be bluer .
• Cooler objects emit most of their radiation at longer wavelengths; hence they will appear to be redder.
• Furthermore, at any wavelength, a hotter object radiates more (is more luminous) than a cooler one.