Physics

Problem

Take the surface temperature of our sun to be 6000 K and its luminosity to be

3.9 \times 10^{26} \text{ W}

. Find, in terms of the solar radius, the radius of a star with: a. temperature 4000 K and luminosity

5.2 \times 10^{28} \text{ W}

b. temperature 9250 K and luminosity

4.7 \times 10^{27} \text{ W}