Answer: D. color
Explanation:
From Wien's displacement law: The peak wavelength emitted by the object is inversely proportional to its temperature. Thus, the spectrum of a star is observed and its peak wavelength is measured. It is the color of the star. Temperature can be calculated:
[tex]T = \frac{2.89\times 10^{-3}m.K}{\lambda_{peak}}[/tex]
A red color (longer wavelength) star would have low temperature than a blue star (shorter wavelength).
