A mobile phone lies along the principal axis of a concave mirror, as shown in fig. Show by suitable diagram, the formation of its image. Explain why the magnification is not uniform. Will the distortion of image depend on the location of the phone with respect to the mirror?

Dear Student,

The ray diagram for image formation is drawn.

We can imagine that mobile phone is made up of a number of pieces each placed perpendicular to the principal axis. One such piece is BC. as the piece is placed at C, we get an inverted image at C of the same size as shown by B'C. Now the other pieces are located at C and F. We know that as the object is brought closer to the mirror from C to F, the image moves away from the mirror, remains real and inverted, and increases in size. Thus, the magnification is not uniform and image is distorted.


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