Compute the solar constant, which is calculated using the intensity formula
Use the following information.
Surface temperature of the Sun:
Radius of the Earth:
Radius of the Sun:
Temperature of outer space:
Begin with the Stefan-Boltzmann law for radiation to calculate the thermal power of the Sun
We can assume that the Sun is a blackbody, so the emissivity is .
Note that the Stefan-Boltzmann constant is .
This power is reduced by the inverse square law of distance
This is close to the actual value .