Physics
Wien's Displacement Law
Quick fact
The hotter an object is, the shorter its peak wavelength of emitted radiation — this relationship was discovered by Wien's Displacement Law.
Why this is interesting
Have you ever wondered why the sun glows yellow while fire can appear red or blue? The answer lies in how hot objects emit light.
Read the full explanation
Understanding Wien's Displacement Law
Wien's Displacement Law states that the peak wavelength of thermal radiation from a blackbody is inversely proportional to its temperature. This means that as an object gets hotter, it emits more energy at shorter wavelengths, shifting its color from red to yellow and eventually blue.
A deeper explanation
Wien's Displacement Law arises from the behavior of electromagnetic waves emitted by objects in thermal equilibrium. As the temperature increases, the peak wavelength shifts toward shorter wavelengths, which correspond to higher energy photons. This principle is crucial for determining the temperatures of stars and other distant celestial bodies based on their observed light spectra.