Physics Form 4: Chapter 5 - Ray Diagrams of Convex Lens

Ray Diagram Rules for Convex Lens

1. Any incident ray travelling parallel to the principal axis of a convex lens will refract through the lens and travel through the focal point on the opposite side of the lens.
2. Any incident ray travelling through the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.
3. Any incident ray passes through the center of the lens will in affect continue in the same direction that it had when it entered the lens.

Examples of ray diagram with different object distance