* Blackbody Radiation: Stars emit light across the electromagnetic spectrum, much like a perfect "blackbody" radiator. The peak wavelength of this radiation is determined by the star's temperature.
* Wien's Displacement Law: This law states that the peak wavelength of radiation emitted by a blackbody is inversely proportional to its temperature.
* Visible Light Spectrum: Our eyes are most sensitive to visible light, which spans from violet (shortest wavelength) to red (longest wavelength).
* Temperature and Wavelength:
* Hot stars: Emit more radiation at shorter wavelengths, which are perceived as blue or white.
* Cool stars: Emit more radiation at longer wavelengths, which are perceived as red or orange.
Here's a simplified breakdown:
* Blue-White Stars: The hottest stars, with surface temperatures of 25,000 K or more.
* White Stars: Have temperatures around 10,000 K.
* Yellow Stars: Like our Sun, with temperatures around 5,500 K.
* Orange Stars: Cooler stars, with temperatures around 3,500 K.
* Red Stars: The coolest stars, with temperatures around 3,000 K or less.
In summary: The color of a star is a visual indicator of its surface temperature. Hotter stars emit more blue light, while cooler stars emit more red light.
