GKFix MCQ Question

In the formula Dm = 2i - A, what do the symbols represent when the prism is at minimum deviation?

• A. Dm is deviation, i is angle of incidence, A is angle of emergence.
• B. Dm is minimum deviation, i is angle of refraction, A is prism angle.
• C. Dm is maximum deviation, i is angle of incidence, A is angle of emergence.
• D. Dm is minimum deviation, i is angle of incidence, A is prism angle.