Hello please answer and explain :

sin(Or) vs sin(0i) pour la lumiere qui passe d'un polymere a un verre 0.9. Linear Fit for: Data Set | sin(Or) = mx+b 0.7- m (Slope): 1.525 +/- 0.030 b (Y-Intercept): -0.023 +/- 0.012 Correlation: 0.999 RMSE: 0.012 sin(Or) 0.5- 0.3- 0.14 0.2 0.3 0.4 0.5 0.6 sin(0i)