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An optician, while testing the eyes of a patient, keeps a chart of letters 3m behind the patient and asks her to see the letters on the image of the chart formed in a mirror kept at distance 2m in front of her. How far is the chart seen by the patient?

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answer is D.

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Detailed Solution

The chart is seen by the patient at a distance of 7m.

https://www.vedantu.com/question-sets/bb8796c4-baff-4f3a-8ae9-738b1576cc924974115416073890105.png

Distance of the chart (i.e. the object) from the plane mirror=

3 + 2 = 5 m

The distance of image from the mirror

= 5 m

The patient is at a distance of 2m from the mirror. Hence, the distance of the image from her

= 5 + 2 = 7 m

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