As the Sun evolves into a red giant in the distant future, then according to Wien's Law:
A)most of its energy must become shorter in wavelength.
B)its peak on the Planck curve will move into the infrared.
C)its total luminosity must decrease.
D)it will disappear from the universe of visible light.
E)its light will be slowed down by its increasing mass.

Question

Quizplus · Accepted Answer

Wien's Law states that as the temperature of an object increases, the peak of its emission spectrum shifts to shorter wavelengths. As the Sun evolves into a red giant, its surface temperature will decrease, causing its peak on the Planck curve to shift into the infrared region. Wien's Law states that as the temperature of a blackbody (in this case, the Sun) increases, its peak wavelength of emission shifts towards the shorter end of the electromagnetic spectrum. Therefore, as the Sun's temperature decreases during its evolution into a red giant, its peak wavelength will shift towards the longer end of the spectrum, specifically into the infrared.

As the Sun Evolves into a Red Giant in the Distant