What is wien's displacement law?

Wien's Displacement Law states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature.

Specifically, the law is expressed as:

λ_max = b / T

Where:

• λ_max is the peak%20wavelength (in meters) at which the black-body radiation curve reaches its maximum.
• T is the absolute%20temperature (in Kelvin) of the black body.
• b is Wien's%20displacement%20constant, approximately equal to 2.898 × 10^-3 m⋅K.

This law helps us understand the relationship between the temperature of an object and the color of light it emits. Hotter objects emit light with shorter wavelengths (towards the blue end of the spectrum), while cooler objects emit light with longer wavelengths (towards the red end of the spectrum). At room temperature, objects emit infrared radiation, which is invisible to the human eye. This concept is crucial in fields like astronomy where the temperature of stars can be estimated by analyzing the light they emit.