Question

On a Sunny day. Sree Ram was working with a convex lens. At a particular height, he observed that the

sun light through the lens is burning the dry leaves on the ground.

The distance between the lens and the dry leaves is equal to [ ]

A) Half the focal length B) Equal to focal length

C) 1

4

th of the focal length D) Double the focal length​

Answer 1

Answer:

B) Equal to focal length

Explanation:

Convex lens converges rays at focal point. So the rays are concentrated at its focal length resulting in high temp. and the leaves start burning