How to Simulate Total Internal Reflection in COMSOL 4.3a Using Ray Tracing?

[frace]

Hello,
I would like to simulate a beam of light that is incident on a sphere with a refractive index and you get the total internal reflection, I would like to use ray tracing in COMSOL 4.3a. you have any advice on this?
thanks

 

[Greg Bernhardt]

I'm sorry you are not finding help at the moment. Is there any additional information you can share with us?

 

[frace]

Should I apply the law of snell and I can not figure out what expression to use: Newtonian, Lagrangian, Hemiltonian or massless. I hope someone can help me