# Lesson Plan: Images Produced by Thin Lenses Physics

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to relate the sizes and positions of objects to images of them produced by thin convex and concave lenses.

#### Objectives

Students will be able to

• recall that the optical power of a thin lens, , equals the reciprocal of the focal length, , of the lens and that the optical power of a lens has the unit of diopters,
• recall that the signs of the distance of an object from the center of a thin lens, , and the distance of an image of the object, , from the center of the lens are opposite for distances in opposite directions from the center of the lens,
• relate the magnification, , produced by a thin lens to the height of an object, , and the height of the image of the object, , produced by the lens, using the formula ,
• relate the focal length of a thin lens to the distances of the center of the lens from an object and from the image of the object, using the formula ,
• relate the magnification produced by a thin lens to the distances of the center of the lens from an object and from the image of the object, using the formula .

#### Prerequisites

Students should already be familiar with

• the process of construction of images of objects by convex and concave lenses using ray diagrams.

#### Exclusions

Students will not cover

• any lenses other than thin biconvex and biconcave lenses.