Concept #1: Thin Lens Equation
Practice: A biconvex lens has a focal length of 12 cm. If an object is placed 5 cm from the lens, where is the image formed? Is it real or virtual? Is it upright or inverted? What’s the height of the image if the object is 2 cm tall?
Concept #2: Lens Maker Equation
Example #1: What Types of Images Can be Formed by Lenses?
Example #2: Image Formation by a Biconcave Lens