An Innovative Physics Professor Conducts Laboratory Exercises in the College

Multiple Choice

An innovative physics professor conducts laboratory exercises in the college swimming pool. The professor places a submersible laser under water (n = 1.3) and aims the beam at a block of glass (n = 1.5) , which is also under water. At what angle of incidence will the reflected beam be totally polarized?

A) 61°
B) 49°
C) 41°
D) 39°