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Where should a person stand straight from the pole of a convex mirror of focal length 2.0 m on its axis, so that the image formed become half of his original height?A. `-2.60 m`B. `-4 .0 m`C. `-0.5 m`D. `-2.0 m` |
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Answer» Correct Answer - D Given, `m=+(1)/(2),f=2 m=200 cm, u = ?` `therefore` Magnification, `m=(f)/((f-u))` `rArr " " +(1)/(2)=(200)/((200-u))` `rArr " " 200-u=400 rArr u=-200 cm` `rArr " " u=-2 m` |
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