Question

When object lies at 2f in front of a convex lens, its image distance from the lens is at
(a) f
(b) Infinity
(c) Between 2f and infinity
(d) 2f

Answer 1

Answer:

It is in the focus point

Answer 2

Answer:

(d) 2f

Explanation:

When object lies at 2f in front of a convex lens, its image distance from the lens is at 2f. According to the property of refraction of convex lens when we place a object of height "h" at a distance of 2f from the vertex of the lens the imgae formed will be on the other side of the lens and the image will of same height that means magnification of image formed will be 1 and it will be also ral and inverted.