5: Diagram of focal length for a lens with (a) smooth surface and (b)... | Download Scientific Diagram
![The value of the focal length of the lens is equal to the value of the image distance when rays are (A) Passing through optical center(B) Parallel to the principal axis.(C) Passing The value of the focal length of the lens is equal to the value of the image distance when rays are (A) Passing through optical center(B) Parallel to the principal axis.(C) Passing](https://www.vedantu.com/question-sets/5e1c89c0-8591-4536-944d-fabfebe37bbe5538049956207025842.png)
The value of the focal length of the lens is equal to the value of the image distance when rays are (A) Passing through optical center(B) Parallel to the principal axis.(C) Passing
![Lens Focal Length and F-stop | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global Lens Focal Length and F-stop | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global](https://av.jpn.support.panasonic.com/support/global/cs/dsc/knowhow/common/img/knowhowfig01_01l.png)
Lens Focal Length and F-stop | Digital Camera Know-Hows | Digital Camera | Digital AV | Support | Panasonic Global
![File:Object placed between focal point and centre of curvature - convex lens.png - Wikimedia Commons File:Object placed between focal point and centre of curvature - convex lens.png - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/b/b4/Object_placed_between_focal_point_and_centre_of_curvature_-_convex_lens.png)