Physics

Problem

A star can be modeled as a spherical blackbody that emits

3.9\times10^{26}\,\text{W}

and has a peak-emission wavelength of

520\,\text{nm}

. Determine the star’s radius. (Use

\sigma = 5.67\times10^{-8}\,\text{W\,m}^{-2}\,\text{K}^{-4}

and

b = 2.90\times10^{-3}\,\text{m\,K}