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Question

Manasa stands between a set of parallel plane mirrors M1 and M2 as shown in the diagram below. There is a flower on Rose's hat that is located a distance of 0.4 m from M1 and a distance of 1.0 m from M2. Since the mirrors are parallel, Rose will see an infinite number of images of the flower as she looks in mirror M2. These images stretch towards infinity. Some of the images are closer to the mirror than others. Determine the distance between mirror M2 and the third nearest image?


  1. 6.2 m
  2. 2.5 m
  3. 3.8 m
  4. 1.2 m


Solution

The correct option is C 3.8 m

Manasa will see a primary image 1.0 m to the right of M2. She will see a secondary image 1.8 m to the right of M2; this is the image of the image of the rose. Finally, there is a tertiary image located 3.8 m to the right of M2. It is the image of the image of an image.

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