Q:  What is the radiation pressure at the Sun's core?

 
              P(rad)  =   (1/3)  *  (7.57 x 10^(-16) J/m^3/K^4) * (5800 K)^4


                      =   3.7 x 10^(12)  N/m^2


   Q:  How does it compare to the gas pressure?


            The value of gas pressure which we adopted was


              P(gas)  =   3 x 10^(16) N/m^2

            

   Q:  Was our assumption that gas pressure dominates a good one?


            Yes, it was.  The gas pressure appears to be 10,000 times larger
               than the radiation pressure.