Question

State the 3 rules followed for drawing the ray diagrams to show the formation of images in convex lens. (Ensure to draw the diagram and justify the rule)

Answer 1

1) Any incident ray traveling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens.

2) Any incident ray traveling through the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis.

3) An incident ray that passes through the center of the lens will in effect continue in the same direction that it had when it entered the lens.