Image formation by lens

What are the Cartesian sign convention for refraction of light (image formation) by a lens . Draw diagrams to illustrate the same.

State the Cartesian sign convention for refraction of light (image formation ) by a lens.

Image Formation by Spherical Lenses||Power OF the Lens

Power Of Lens|Image Formation By Convex Lens|Image Formation By Concave Lens|Questions

Power Of Lens|Image Formation By Convex Lens|Image Formation By Concave Lens|Questions

Rays Required For Image Formation|Image Formation By Convex Lens|OMR

Image Formation By Concave Lens In Different Position Of Object

Image Formation By Convex Lens In Different Position Of Object