Question

If an object is placed in front of convex lens to form image of same size as the object. With the help of ray
diagram, illustrate the change in position, nature and size of the image formed if the convex lens is replaced
by concave lens of same focal length.​

Answer 1

•If an object is placed in front of convex lens to form image of same size as the object then object distance is equal to radius of curvature.

•If the convex lens is replaced

by concave lens of same focal length.

•Position of image will be between principal focus and optical centre

•Nature will be virtual and erect

•Size of image will be diminished