MDMD(2)

[Brian D. McCary]

>>>     61.5  `mu' its that character again, and it means mercy!

>>In most physics applications, isn't mu a factor of logarithmic attenuation
>>or amplification?

>No.  "Mu" is just another Greek letter, yet another variable to use

The most broadly known common use for mu as a constant that I can think
of is as a representitive of permeability.  Most listers may recall
this from high school physics.  mu-zero is the permeability of free
space, and is used to relate magnetic fields and electric currents in
Maxwell's equations.  Since it is related to the speed of light, some
physicists (notably Feynman) eschew it, using in its place 1/(epsilon-zero*c^2)
which cuts the number of free space constants by 33%.

I doubt that TRP had this relationship in mind when he used the term, but
it's nice to see that magnetic property pop back in again.

Brian McCary
(emerging from six months of immersion in magnetic design, and therefore
prone to rattleing on about magnetics in general)