A blue supergiant star has a radius of 7.4 × 1010 m. The spherical surface behaves as a blackbody radiator. If the surface temperature is 2.4 × 104 K, what is the rate at which energy is radiated from the star?
A) 1.2 × 103 J/s
B) 9.4 × 1019 J/s
C) 2.0 × 1023 J/s
D) 8.2 × 1032 J/s
E) 1.3 × 1033 J/s
Correct Answer:
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