Question

A mobile phone lies along the principal axis of a concave mirror. Show, with the help of a suitable diagram, the formation of its image. Explain why magnification is not uniform.

Answer 1

The image of the mobile phone formed by the concave mirror is shown in the above figure.

The part of the mobile phone that is at C will form an image of the same size only at C.

In the figure, we can see that B'C = BC. The part of the mobile phone that lies between C and F will form enlarged image beyond C as shown in the figure. It can be observed that the magnification of each part of the mobile phone cannot be uniform on account of different locations. That is why the image formed is not uniform.