Question

An object is placed infront of a lens. If we cover the middle part of the lens, the intensity of the image formed will decrease.

• A. True
• B. False

Answer 1

The correct option is A

True

When a part of the lens is covered, image with same nature will be formed at the same place by the light rays passing from the top and bottom of the lens. The rays that were passing earlier through the covered region are not passing now, so the intensity of the image will be reduced.