Fmult

The lengthy calculation now comes from vector stacking; suppose we know the scattering capacity F along certain direction vector, u, for each layer a,b,c,d.  The origins of neighbouring layers form vectors R,


Fa(u)+Fb(u)_corrected_by_Rab+Fc(u)_corrected_by_(Rab+Rbc)+Fd(u)_corrected_by_(Rab+Rbc+Rcd)

so vector manipulation is a lengthy one if you have one thousand layers.

but it is not that bad if they can be clustered.


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BGMN provided two phase functions, reFmult and Fmult; the 1st one, I tend to call it a physical phase, and the 2nd one, I tend to call it a metaphysical phase; for the Fmult, the F_i and phi_i are automatically calculated, i being from 1 and N as defined in the statement Fmult=N.