How does light traveling through different mediums change the angle of refraction?
2 answers
http://www.physicsclassroom.com/class/refrn/Lesson-2/The-Angle-of-Refraction
Because different mediums have different indexes of refraction. Therefore, when you use Snell's Law: (n1)(sinΘi) = (n2)(sinΘr), depending on the index of refraction of both mediums, the angle of refraction will be different.