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The sun is a main sequence G5 type star with a surface temperature TMS = 5800...

The sun is a main sequence G5 type star with a surface temperature TMS = 5800 K. When the sun exhausts its Hydrogen supply it will evolve into a red giant with a surface temperature TRG = 3000 K and a radius of 100 times its present value. What is the peak wavelength of the sun in its main sequence and red giant phases? How many times larger will the sun’s radiative power be in the red giant phase? Assume the sun is a perfect blackbody.

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