Wien's Displacement Law Wien's displacement law states that the wavelength of the peak emission of a black body is inversely proportional to the temperature...
Wien's displacement law states that the wavelength of the peak emission of a black body is inversely proportional to the temperature of the body. This means that:
λ_max ∝ 1/T
where:
λ_max is the peak wavelength in meters
T is the temperature in Kelvin
Interpretation:
At a constant temperature, the wavelength of the peak emission is directly proportional to the energy of the photons emitted.
As the temperature of a body increases, the energy of the emitted photons also increases, which shifts the peak wavelength to shorter wavelengths.
Wien's displacement law allows us to predict the peak wavelength of emitted radiation for a given temperature.
Examples:
The peak wavelength of visible light emitted by a warm object like the Sun is typically around 500 nm.
The peak wavelength of thermal radiation emitted by the Earth's surface is around 10,000 nm.
Wien's displacement law is essential in various applications in radiation, including the study of thermal radiation in different environments and the design of thermal imaging devices