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A distant star is found to have twice the surface temperature as our sun Tstar= 2Tsun....

A distant star is found to have twice the surface temperature as our sun Tstar= 2Tsun. However, the total power emitted from that star’s surface is found to be four times the power emitted from our sun’s surface.

(a) how do you think we know the surface temperature of that star without ever visiting it?(1 point)

(b) What can you tell about the radius Rstar of that star compared to the radius Rsun of our sun?(2 points)

Rstar/Rsun=

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