Given the labeled sketch below, write Snell's Law in terms of the variables given.

s Law:

Given the direction of the light ray shown by the arrow heads, sketch in a few plane wave fronts on both sides of the point $P,$ as well as a wave front going through that point on the refracting boundary $($showing each wavefront in both materials$),$ and then answer the following questions:

In the path above, what is the angle ${}_1$ called? What is the angle ${}_2$ called?

What is $"n"$ called and what is the mathematical definition of $n($define any variables you use in the definition$)?$

Which is larger in the case above, $n_1$ or $n_2?$

Which is greater, speed $v_1$ or $v_2?$