Question

which lense is used to burning the paper [ magnifying glass​

Answer 1

convex lens

This video shows how a convex lens, such as the one found in magnifying glasses, can be used to converge the rays of the sun to such intensity that burning or ignition can happen. This can be tried with dried leaves, pieces of paper or plastic.

Answer 2

Answer:

convex lenses is used to burning the papper