Snell's Law - complex angle of refraction (need "complement")

mfb

The period of sin remains 2pi (real) even in the complex numbers. pi/2-θ looks like a reasonable value for a "complement", but it really depends on the way you plan to use that complement.

mfb Mentor	The period of sin remains 2pi (real) even in the complex numbers. pi/2-θ looks like a reasonable value for a "complement", but it really depends on the way you plan to use that complement.