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Example
of the Stefan-Boltzmann law

•Suppose
a brown-out causes the temperature of a lamp filament to drop to 0.9 of its original value. By what factor does the light output of the lamp drop?

•Using
the Stefan-Boltzmann law (with the numerical value of s) we could have calculated how big (in m2) a light filament would have to be to emit 100 W of light, at any given temperature.

•We
could also use it to find the size of a star, if we know how much light energy that star emitted

From our text: Horizons, by Seeds