I assume you mean index of refraction. Use a vacuum-material X planar interface.
Insert a planewave use the reflected and transmitted waves to compute the index
of refraction. (Some more details on what you want to do may be helpful.)
I assume you mean index of refraction. Use a vacuum-material X planar interface.
Insert a planewave use the reflected and transmitted waves to compute the index
of refraction. (Some more details on what you want to do may be helpful.)
I don't know if it will be helpful. In any case some effort on your
part will be required. It would be helpful if you tell us what materials
(textbook etc) you are using and where you have difficulties.