Table 1 Refraction at the Water-Air Interface Angle of Angle of (e ) uis u n, sin(0,) Is n,sin(0,) = n,sin(0,)? incidence (0.) refraction (0,) (use your calculator or (use your calculator or Are the values in (degrees) (degrees) Excel to find this) Excel to find this) columns 3 and 4 approximately equal? Oo 0 0 0 Not applicable 10 13 (1.33) (sin 10 ) = 0.23 (1.00) (sin 13 ) = 0.22 Yes 20 30 40 450 480 490