Thursday

April 17, 2014

April 17, 2014

Posted by **Tim** on Tuesday, April 30, 2013 at 8:33pm.

- Physics -
**Elena**, Wednesday, May 1, 2013 at 2:38amT=273+22=295 K

radiant emittance R

radiant emittance of the black body R*

Stefan-Boltzmann law

R*=σT⁴

Stefan-Boltzmann constant σ =5.67•10⁻⁸ W•m⁻²•K⁻⁴

R= =kR*=kσT⁴

E=RAt =kσT⁴At

E₁=R₁At =k₁σT⁴At

=0.84•5.67•10⁻⁸•180•10⁻⁶•295⁴•1=0.065 J

E₂=R₂At =k₂σT⁴At

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