1. What is the measured critical angle for a laser beam traveling from water to air? Compute an experimental value for the index of refraction for water using this measured angle.Incident Angle, 0; Refracted angle, OT Degrees (Degrees) Sine; (Degrees) Siner (Degrees) 0 0 0 0 5 5 0.0872 0.0872 10 11 0.1736 0.1908 15 13 0.2588 D.2250 20 17 0.3420 0.2924 25 24 0.4226 0.4067 30 27 0.5 0.4540 35 30 0.5736 0.5 40 35 0.6428 0.5736 45 40 0.7071 0.6428 50 43 0.7660 0.6820 55 48 0.8192 0.7431 60 50 0.8660 0.7660 65 52 0.9063 0.7880 70 54 0.9397 0.8090 75 55 0.9659 0.8192 80 57 0.9848 0.8387 85 60 0.9962 0.8660 90 65 0.9063