![Lesson 4 Define the terms principal axis, focal point, focal length and linear magnification as applied to a converging (convex) lens. Define the power. - ppt download Lesson 4 Define the terms principal axis, focal point, focal length and linear magnification as applied to a converging (convex) lens. Define the power. - ppt download](https://images.slideplayer.com/26/8618169/slides/slide_4.jpg)
Lesson 4 Define the terms principal axis, focal point, focal length and linear magnification as applied to a converging (convex) lens. Define the power. - ppt download
![Section 12.2 Pages Lens Terminology The principal axis is an imaginary line drawn through the optical centre perpendicular to both surfaces. - ppt download Section 12.2 Pages Lens Terminology The principal axis is an imaginary line drawn through the optical centre perpendicular to both surfaces. - ppt download](https://images.slideplayer.com/17/5279752/slides/slide_2.jpg)
Section 12.2 Pages Lens Terminology The principal axis is an imaginary line drawn through the optical centre perpendicular to both surfaces. - ppt download
![The light rays parallel to the principal axis meet at point M after passing through a convex lens. What is the power of the lens? The light rays parallel to the principal axis meet at point M after passing through a convex lens. What is the power of the lens?](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1457665/original_Untitled_%284%29.png)
The light rays parallel to the principal axis meet at point M after passing through a convex lens. What is the power of the lens?
![optics - How to find the principal axis of the pieces of lens after billetsplit cutting? - Physics Stack Exchange optics - How to find the principal axis of the pieces of lens after billetsplit cutting? - Physics Stack Exchange](https://i.stack.imgur.com/znVFr.jpg)
optics - How to find the principal axis of the pieces of lens after billetsplit cutting? - Physics Stack Exchange
![A light ray MN becomes parallel to the principal axis after passing through a concave lens. The distance OA is theof the lens. A light ray MN becomes parallel to the principal axis after passing through a concave lens. The distance OA is theof the lens.](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1541977/original_14_%281%29-01.png)