GKFix MCQ Question

What is the relationship between the angles ∠NOM and ∠NCM as used in the derivation (Figure 9.15)?

• A. ∠NOM + ∠NCM = i (the angle of incidence)
• B. ∠NOM = ∠NCM
• C. ∠NOM - ∠NCM = i (the angle of incidence)
• D. ∠NOM * ∠NCM = i (the angle of incidence)