Grade 12th pass7 grade science
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?
a. 3m
b. 2m
c. 6m
d. 7m
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?
a. 3m
b. 2m
c. 6m
d. 7m
