Question

Describe any observations one could use for determining the temperature of the star.

Answer 1

the temperature of a star is easily determined by using the Wein's Displacement law. For that we need only the radiated energy distribution from the sun. By analysing the radiated energy curve over a range of wavelengths, we see that there will be a peak value of radiated energy at a particular wavelength. We call that wavelength as . Then, according to the Wein's law,

where a is a constant its value is given by,

Then, the temperature of the star is given by,

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