Module 5 : MODERN PHYSICS
Lecture 23 : Black Body Radiation
  Example 2
  Estimate the radiant energy emitted by a blackbody at 6000 K.
  Solution
 
According to Stefan's law the radiant power emitted per unit area is
 
$\displaystyle \sigma T^4 = 5.67\times 10^{-8} \times (6000)^4 = 7.35\times 10^7\ \ {\rm W/m^2}$

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