Here, in this post, we listed 3 rules for the formation of images by Convex Lens. After studying these, it will be easier to study the image formation by convex lenses, and related ray diagrams.
Rules for the formation of images by Convex Lens
(i) A ray of light coming parallel to the principal axis, after refraction through the lens, passes through the
principal focus (F) as shown in figure a.
(ii) A ray of light passing through the optical center O of the lens goes straight without suffering any deviation as shown in figure b.
(iii) If a ray of light coming from the object passes through the principal focus of the lens, then after refraction through the lens it becomes parallel to the principal axis. [figure c]
