Proportional to the angles, how large is the effect of frequency dependence on Snell's Law. Is it reasonable to ignore, or should any decent implementation sum over a range of frequencies.
I believe for Snell's law is it reasonable to ignore the frequency dependence.
Total internal reflection is the reason fiber optic cables are able to "bend" light through a a cable. I would imagine in a fiber optic cable light bounces many times, is it feasible for a ray tracing algorithm to model this?
Some materials have an index of refraction that is dependent on the frequency of the light. However, for most materials, this effect is negligible.