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how we canthe temp of a star be determing by its color

how we canthe temp of a star be determing by its color

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Answer #1

Each star emits radiation with different wavelengths as a blackbody.

This spectrum has a maximum. That is the intensity of star has a maximum at a particular wavelength called

Wien's displacement law relates predominant color of the star (color of wavelength ) to stellar temperature. (  where is a constant )

Cool stars ( with low temperatures) radiate energy mostly in the red and infrared region of EM spectrum , so the low temperature stars appear red.

Hot stars ( with high temperatures) emit mostly inblue and UV wavelenths, so the hot stars appear blue in color.

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