Question

An optician while testing the eyes of a patient keeps a chart of letters 3m behind the patient and asks him to see the letters on the image of chart formed in a plane mirror 2 m in front of him .
At what distance is the chart seen by the patient ???

Answer 1

At 5m distance is the chart seen by patient.
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Answer 2

Since the chart is kept 3m behind the patient and he has to see its image in a plane mirror 2m in front of him, the distance of the chart from the patient = 3+2
= 5m

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