I’m trying to figure out the velocity of light in a material that is called “mystery a” that I need the answer of to figure out what the index of refraction is so I can solve my problem and I don’t have any information except the line splits when it goes through the medium and the part that refracts is 71.73% intensity and the part that reflects is 28.27 and I was wondering how I can get the c/v= index of refraction