![]() ![]() Our eyes combine all of these colors and we see white in this case. We don't see any stars as green because stars with peak wavelengths in the green also emit lots of radiation in the red and blue part of the spectrum. A hotter star like our sun emits the most radiation in the yellow/green part of the spectrum. Red stars are cooler, and they emit the most radiation in the red wavelengths. Stars behave approximately like blackbodies, and this concept explains why there are different colors of stars. It then emits thermal radiation in a continuous spectrum according to its temperature. A black body is an idealized object that absorbs all electromagnetic radiation it comes in contact with. Colder objects emit waves with very low frequency (such as radio or microwaves), while hot objects emit visible light or even ultraviolet and higher frequencies.īlackbody radiation is a term used to describe the relationship between an object's temperature, and the wavelength of electromagnetic radiation it emits. All objects emit electromagnetic radiation according to their temperature.
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