Question

how to draw formation image through lens
​

Answer 1

which lens concave/ convex

Answer 2

Image Formation in Lenses Using Ray Diagrams

Ray diagram helps us to study the nature, position and relative size of the image formed by lenses.

For drawing ray diagrams we first consider how light rays falling on both concave and convex lens in three different ways get refracted.

First consider the case for convex lens

hope this answer helpful u