July 28, 2010

Stefan–Boltzmann constant

Stefan–Boltzmann
 the total energy  radiated per unit surface area of a black body in unit time is proportional to the fourth power of the thermodynamic temperature.

The value of the Stefan–Boltzmann constant can be determined by below formula


Sigma = 2Pi5kb4/15h3c2
where:
kb is the Boltzmann constant;
h is the Planck constant;
c is the speed of light in vacuum.

sigma = 5.670 400 x 10-8 Wm-2K-4

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