Question

a student obtained clear image of Window grills on the screen but the teacher told him to get the image of a tree far away instead of window. to get a clear image the lens must be........

Answer 1

U should use concave to see far image

Answer 2

Upon drawing the diagram we will see that the rays from the grill are focused on point-A.

However, since the tree is the distant object its rays are focused on point-B.

Therefore, it is required that we move the lens towards the screen so that we can obtain a much sharper image of the tree.