1. The problem statement, all variables and given/known data The critical angle of a certain plastic in air is 37.3 degrees. Wats the critical angle of the same plastic if its immersed in water? 2. Relevant equations n1sin( theta)= n2sin(theta) 3. The attempt at a solution Nair= 1.00 1.00sin37.3/1.33 = sin(theta) sin(theta)= .455 inverse sin (theta) = 27.1 degrees Is that right?