Image Formation in Concave and Convex Lens**
THE PHYSICS CAFE CHAPTER TEN - LIGHT - REFLECTION AND REFRACTION 1.18 Image Formation in Concave and Convex Lens** Rules for Image Formation in both Concave and Convex Lens: Always place the object left side of lens. Take two light rays from the head of object. One parallel to principal axis and second incident at optical centre. Incident light ray parallel to principal axis will always pass through focus. ...