Question

Which mirror is used to burn paper? ​

Answer 1

Answer:

When a concave mirror is exposed to the sun, all the incident sun rays are converged to the focal point and hence energy radiations are focussed at a single point. Hence, paper burns when it is kept at the focal point.

Hope this answer helps you out.

Answer 2

Answer

• $\large \ \tt \red{concave \: \: mirror}$

Definition

• Concave mirror acts as a convergent medium for the recipient rays of lights which focus the ray of light at the focal point of the mirror which cause heat and burn the paper when heat increase.

• We can use concave mirror to burn the paper by the converging of all the incident rays of sun on a focal point and when energy radiation focus in a single point it heat's up and burn the paper.

• Convex lens can also burn the paper but as your question is about mirror, so the answer is Concave Mirror.