1. The problem statement, all variables and given/known data I need to calculate refraction angle of light, if light ray is falling to the surface of aquarium water from the bottom in the angle of 60 degrees, n for water = 1,33 2. Relevant equations sinφ2=(n1×sinφ1) /n2 3. The attempt at a solution So i get sinφ2=1,33*0,866( meant as sin60) / 1 = 1,15178 this is where i ended and teacher didn`t liked it... Is there a mistake in calculations? Whats the final refraction angle?