 #1
Eitan Levy
 259
 11
 Homework Statement:

A spherical shell with a radius of R surrounds a star with temperature T.
Find the amount of energy that the shell from the star in an hour.
 Relevant Equations:
 [tex] P=\sigma*A*T^4 [/tex]
I don't understand how this can be solved.
The official solution was:
[tex] F=\sigma*T^4 [/tex]
[tex] E=F*4\pi R^2*60*60 [/tex]
This doesn't make sense to me, as it seems to imply that the energy that the black body radiates depends on the radius of the shell. For a very large shell the body will reflect "infinity" energy.
Can someone please explain this?
Thank you.
The official solution was:
[tex] F=\sigma*T^4 [/tex]
[tex] E=F*4\pi R^2*60*60 [/tex]
This doesn't make sense to me, as it seems to imply that the energy that the black body radiates depends on the radius of the shell. For a very large shell the body will reflect "infinity" energy.
Can someone please explain this?
Thank you.