Quiz practice

Consider a 650 nm laser beam.  It heads into a block of plastic (n = 1.7) at an initial angle of 40 degrees.  Find the following:

a.  angle of refraction

b.  frequency inside the block

c.  wavelength inside the block

d.  critical angle of the block

e.  speed of light inside the block

Be sure to review how to draw "normal lines" (perpendicular) and predict the path that light takes upon entering a new medium.