One of the ways that a forensic scientist can figure out the make and model of a car from a "hit and run" collision is if they can pick up a piece of plastic from the headlight of the car. The plastics in a car tend to be different for different makes and models of cars and thus have different index of refractions which you can find in a table. If you were given a flat piece of plastic from a hit and run, write down a procedure to figure out what type of car was involved in the hit and run.