Question: Sirius B is a white star that has a surface temperature (in kelvins) that is four times that of our sun. Sirius B radiates only

Sirius B is a white star that has a surface temperature (in kelvins) that is four times that of our sun. Sirius B radiates only 0.040 times the power radiated by the sun. Our sun has a radius of 6.96 × 108 m. Assuming that Sirius B has the same emissivity as the sun, find the radius of Sirius B.

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