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quote:Originally posted by Soul SurferI haven't worked through the maths but delving back into my memory Wien's equations on radiative enrtgy is an approximation at the high energy end of the spectrum and the Rayliegh equations are an approximation at the low energy end of the radiation spectrum (these go of to infinity as the frequency increases!)and it required the Planck equations (based on the fact that the radiant energy was quantised and the energy of each quantum went up as the frequency increased) This was the start of quantum mechanics to resolve the problem because both the Rayliegy and the Wien equations gave impossible values when you took them outside the area where their approximations were valid.

quote:Originally posted by Soul SurferI noted that but you have to dissect the origins of the equations very carefully to know if there has been an approximation in ththe way they have been formulated.I am not quite sure why you used that peculier formula containig infinities to change between wavelength and frequency when the standard equation for any wave motion is wavelength times frequency is velocity.ie v x l = cIf you do that the indexin the equation should not change from 3 to 5 this is why your results differ in substitution.ie v x l = c