The red supergiant Betelgeuse has a surface temperature of 3600 K.

Question

a) Using the fact that the Sun's surface temperature is about 5800 K and that its continuous spectrum peaks at a wavelength of 500 nm, find the peak wavelength of Betelgeuse's continuous spectrum. (Please enter your answer in units of nanometers)

Answer 1

http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/wien3.html

Answer 2

Thank you!