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brad asked quite a sensible question:
how are they fomulated and why?
He made them up to fit empirical data...
From http://hypertextbook.com/physics/modern/planck/
"Using statistical mechanics, Planck derived an equation similar to the
Rayleigh-Jeans equation, but with the adjustable parameter h. Planck
found that for 6.63 =D7 10-34 J=B7s, the experimental data could be
reproduced."
SCW
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