Wien's Tail or Wien's approximation is used to describe the spectrum of electromagnetic radiation from a blackbody. The equation accurately describes the short wavelength limit but fails to fit experimental data for long wavelengths. It's compliment is Rayleigh-Jean's Law, which accurately describes long wavelengths but fails to describe short wavelengths
Think low wavelength, high frequency
Equations[]
For wavelength , the law can be expressed as:
For frequency , the law can be expressed as:
Recognizing the Wien Tail[]
We can simplify Plank's Law when the following inequality holds: