Nicely done finishing the math review. Now let's talk a little bit about refraction.
It is really cool!
In lab 6 we studied what waves did when they reached a boundary and were transmitted
into a new medium.
We looked at transverse waves that went from a plastic slinky to a metal slinky and vice
versa. When the wave crossed the boundary, some of its properties changed.
Light is also a wave. When it reaches a boundary between 2 different media its properties change just like they did for the waves on the slinky.
What does NOT change when light moves from one medium to another?