Question

Compare the surface temperature of a red star with the temperature of a yellow star

Answer 1

The surface temperature of a red star is lower than the surface temperature of a yellow star.

Explanation:

For a red star, the peak of the wavelength of the emitted light is in the red spectrum, therefore the average peak wavelength is:

$\lambda = 680 nm = 680 \cdot 10^{-9} nm$

The corresponding temperature at the surface of the star can be  found by using Wien's displacement law:

$T=\frac{b}{\lambda}$

where

$b=2.898\cdot 10^{-3} m\cdot K$ is a constant. Substituting, we find

$T_r=\frac{2.898\cdot 10^{-3}}{680\cdot 10^{-9}}\sim 4300 K$

For a yellow star, the peak of the wavelength of the emitted light is in the yellow spectrum, therefore the average peak wavelength is:

$\lambda = 580 nm = 580 \cdot 10^{-9} nm$

So we can use again the same equation to find the corresponding surface temperature of a yellow star:

$T_y=\frac{2.898\cdot 10^{-3}}{580\cdot 10^{-9}}\sim 5000 K$

Therefore, we see that the surface temperature of a red star is lower than the surface temperature of a yellow star.

Learn more about temperature:

brainly.com/question/1603430

brainly.com/question/4370740

#LearnwithBrainly