Blackbody Radiation

[dcm18]

Hopefully someone can help me with this question because I am not sure....

 

Calculate the energy radiated by a spherical blackbody of radius 0.75 m at 1500K per second. What would the radius of a spherical blackbody at 2750 K be if emitted energy at the same rate as the blackbody of radius 0.75 m at 1500 K?

 

Any help would be great!

 

Thanks

[swansont]

Use the Stefan-Boltzmann law.

 

http://en.wikipedia.org/wiki/Stefan-Boltzmann_law

[dcm18]

Thanks!