# Star's Temperature and Energy radiated by it

(a) A star's temperature is 6175 K. According to the Stefan-Boltzmann law, how much energy is radiated into space per second by each square meter of the star's surface ?

1..... J

(b) If the star's radius is 605,000 km, what is the total power output of the star?

2 ...... W

https://brainmass.com/physics/stars/stars-temperature-energy-radiated-242971

#### Solution Preview

According to the Stefan-Boltzmann law, The energy radiated by a blackbody radiator "per second per unit area" is proportional to the fourth power of the absolute temperature.

Energy per area per second = sigma x T^4 Joules/m^2 s

where sigma = 5.67 x 10^-8 W/m^2 ...

#### Solution Summary

Easy to understand step by step solution is provided.

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