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Rules for the formation of images by Convex Lens – class 10

Last updated on June 15th, 2023 at 04:29 pm

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.

Rules for the formation of images by Convex Lens - rule 1. 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.
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.

Rules for the formation of images by Convex Lens - rule 2. A ray of light passing through the optical center O of the lens goes straight without suffering any deviation as shown in figure b.
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]

Rule 3 for the formation of images by Convex Lens. (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]
figure c
See also  Magnification values and signs produced by a Lens & their implication | Lens Magnification rules
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