Question

what do scientists use to determine the temperature of the star? A. therometer B.distance from earth C. composition D .color?

Answer 1

Color cause stars are pretty far. Blue actually means that it's even hotter than red.

Answer 2

Answer: D. color

Step-by-step 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:

`T = (2.89* 10^(-3)m.K)/(\lambda_(peak))`

A red color (longer wavelength) star would have low temperature than a blue star (shorter wavelength).