The red supergiant Betelgeuse has a surface temperature of 3600 K.
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)
2 answers
http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/wien3.html
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