# If a star’s surface temperature is 30,000 K, how much power does a square meter of its surface radiate?

##### 1 Answer

May 23, 2015

To calculate the emitted power per square meter we need to use Stefan-Boltzmann’s Law,

that is,

where

**Given/Known:**

area =

**Unknown:**

**Solution:**

(answer has 1 sig fig due to 1 sig fig in 30000K)

Resources:

http://astroweb.case.edu/ssm/100f09/HW4_soln.pdf

http://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law