Image formation by lens||ray diagram||graphs

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

Rules For Image Formation By 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

Image Formation From Convex Lens

Image Formation From Concave Lens

Draw ray diagrams showing the image formation by a concave mirror when an object is placed at centre of curvature of the mirror

When a convex lens is focussed on a distant object, where will the image be formed? Show it with a ray diagram