(a) A narrow beam of light containing yellow (660nm) and green (550nm) wavelengths goes from polystyrene to air, striking the surface at a 30 degree incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel to be separated by 1.00 mm? I need some guidance on if i am working the problem right! Do i use Snell's Law? 1.49sin30 = 1.000293sin(angle)?