# Converging Lens Ray Diagram

Monday, September 7, 2020

*Edit***Converging Lens Ray Diagram**. Here are ray diagrams for the four cases from the video plus one more. You can also illustrate the magnification of a lens and the difference between real and virtual images.

To draw these ray diagrams, we will have to recall the three rules of refraction for a double convex lens: Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel. Solve using both a ray diagram and the thin lens equation. In a ray diagram, a convex lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens.

### This Demonstration lets you visualize the ray diagrams for converging and diverging lenses.

The point where all rays which enter the lens parallel to its axis are brought to a focus is called the principal focus.

If those surfaces are bent outwards, the lens is called a biconvex lens or simply convex lens. Firstly, lenses can either be drawn as lens shapes or as lines with arrows on them. They come together at a point called the principal focus.