GKFix MCQ Question

What is the power of a lens, and how is it related to its focal length (f)?

• A. Power (P) = f, measured in meters
• B. Power (P) = f², measured in square meters
• C. Power (P) = 1/f (in meters), measured in Dioptres
• D. Power (P) = 2/f, measured in Dioptres