1. The problem statement, all variables and given/known data A laser beam enters a 10.0cm thick glass window at an angle of 30 degrees from the normal. The index of refraction of the glass is 1.46. At what angle from the normal does the beam travel through the glass? 2. Relevant equations sin theta 1 / sin theta 2 = n1 / n2 = v1 / v2 3. The attempt at a solution sin (30) / sin theta 2 = 1 / 1.46 theta 2= 46.89 degrees Not sure what I'm doing wrong here? I also tried 90 deg - 46.89 = 43.11 deg but that was also wrong.