Question

Please include any relavant equations and be as thorough as possible (~ 3 - 4 sentences). Thank you!

1. Will two stars of the same spectral type always have the same temperature? Explain.

Answer 1

The spectrum of a star is close enough to the standard blackbody spectrum. Hence we can use Wien's Law

$\lambda _{max} = \frac{0.29 cm K}{T}$

where $\lambda _{max}$ is the wavelength of  the emission peak. This eqation is helpful to calculate that star’s temperature.

Now, two stars of the same spectral type have same $\lambda _{max}$ and hence have the same temperature.

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