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🔍 PREVIEW MODE – Only you can see this. Back to Admin EduTek Lesson Notes Shop Print PDF Home › SS › Physics › Light III – Lenses SS 1 Light III – Lenses Physics SS 1 Third Term (Week 3) 📌 Learning Objectives By the end of this lesson, you should be able to: Define a lens and distinguish between convex and concave lenses. Identify and describe key lens terminology (optical centre, principal axis, focus, focal length). Construct ray diagrams for convex and concave lenses. Apply the lens formula ( [Preview only]