The relation between the colour and the tempe | vedclass

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(A) According to Wien's displacement law,$\lambda_{m} T = b$,where $b$ is Wien's constant.This law states that the wavelength $\lambda_{m}$ correspond

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Wien's displacement law

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(A) According to Wien's displacement law,$\lambda_{m} T = b$,where $b$ is Wien's constant.This law states that the wavelength $\lambda_{m}$ corresponding to the maximum spectral emissive power is inversely proportional to the absolute temperature $T$ of the black body.Since the colour of a star depends on the wavelength of the light it emits most intensely,its surface temperature is directly related to its colour.For example,red stars have a longer wavelength and thus a lower temperature,while blue stars have a shorter wavelength and a higher temperature.

The relation between the colour and the temperature of a star is given by

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