Refraction formula: StartFraction, mu Subscript, 1 , Baseline Over "v" , EndFraction minus StartFraction, mu Subscript, 2 , Baseline Over "u" , EndFraction equals StartFraction, mu Subscript, 1 , Baseline minus mu Subscript, 2 , Baseline Over "R" , EndFractionμ1v−μ2u=μ1−μ2R
