Page 17 - Science E-Book Prep.3 2024-2025 1st term_ unit 2_Neat

Science Department
Prep.3

Note:

- As the radius of curvature
increases,the focal lens will
increase
So, thick lens has a focal
length larger than that of thin lens.
Rules for determination the direction of the light rays afterpassing
through the convex lens:

Path of the incident Path of the emergent Figure
ray ray

Parallel to the Refracted ray will pass
principal axis through the focus

Passes through the Refracted ray will be

focus parallel to the

principal axis

Passes through the Incident ray will pass
optical center of the without refraction
lens

Note:

The position and properties of the image formed by the convex lens can
be determined by using only two rays.

First Term 35