When you walk, you push against the floor, and
a. the floor needs to be frictionless.
b. the floor pushes back against you.
c. the floor doubles your momentum.
d. your shoes store momentum.

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave