![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Comparison_Wien_Planck_radiation.png/640px-Comparison_Wien_Planck_radiation.png&w=640&q=50)
Wien approximation
Physical law / From Wikipedia, the free encyclopedia
"Wien's distribution law" redirects here. Not to be confused with Wien's displacement law.
Wien's approximation (also sometimes called Wien's law or the Wien distribution law) is a law of physics used to describe the spectrum of thermal radiation (frequently called the blackbody function). This law was first derived by Wilhelm Wien in 1896.[1][2][3] The equation does accurately describe the short-wavelength (high-frequency) spectrum of thermal emission from objects, but it fails to accurately fit the experimental data for long-wavelength (low-frequency) emission.[3]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Comparison_Wien_Planck_radiation.png/640px-Comparison_Wien_Planck_radiation.png)