משוררים בצורה חלקה מול focal length magnification מחסום פטור קטסטרופה
What is Lens Formula? - Calculating Magnification | Power Lens
Focal length - Wikipedia
Telescope Equations: Magnification
SOLVED: A lens that has a focal length of 5.00 cm is used as a magnifying glass (a) To obtain maximum magnification and an image that can be seen clearly by normal