More Snell's Law fun!

(Trig practice)

1.  Consider a triangle with sides 20,21, and 29.  Find all the angles in the triangle.

2.  Choose any other Pythagorean triple and find the angles in the triangle:

http://en.wikipedia.org/wiki/Pythagorean_triple

(Snell's Law)

3.  A 450 nm blue light ray hits a piece of Plexiglas (n = 1.6) at an angle of 55 degrees with respect to a normal line.  Find the following:

a.  picture that represents what happens

b.  angle inside Plexiglas

c.  wavelength inside Plexiglas

d.  speed of light inside Plexiglas

4.  Light hits a piece of unknown material, such that the light refracts from 60 degrees to 35 degrees.  If the light enters from air, what is the index of refraction of the material?

5. Review all of the relevant formulas discussed so far to make sure you understand each one.  Include the new ones from class today.