The changing of a light ray’s direction when it passes through variations in matter is called refraction. The speed of light in vacuuum c=2.9972458×108∼3.00×108m/s Ind...The changing of a light ray’s direction when it passes through variations in matter is called refraction. The speed of light in vacuuum c=2.9972458×108∼3.00×108m/s Index of refraction n=cv, where v is the speed of light in the material, c is the speed of light in vacuum, and n is the index of refraction. Snell’s law, the law of refraction, is stated in equation form as n1sinθ1=n2sinθ2.
