Hi Ben,
I misunderstood your problem. sigma expects a number and not a
function, as you discovered.
If I modify this function as follows, your code works because sigma_func
gets evaluated:
(define (make-polarizability-from-conductivity sigma_func omega_in)
(make polarizability
(omega omega_in)
(gamma omega_in)
(delta-epsilon (/ 1 omega_in))
(sigma (sigma_func 42))
)
)
You proably want to evaluate what you want sigma to be higher up in
make-mat-from-eps-and-sigma. Instead of calling
make-polarizability-from-conductivity and passing it a function, you
only pass a single sigma value.
Kind Regards,
Matt
> As it happens, I've already read all these threads. I was specifically aware
> of
> the need to assign the polarizability I used to a simple-dielectric object.
> For
> that reason, I wrote a function "initialize-polarizability", which assigns
> that
> polarizability to a size-0 object at infinity, as suggested by Dr. Johnson in
> one of those threads.
>
> - --Ben
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