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Q.

An object is placed infront of the plane mirror of length ‘L’ at a distance ‘d’ on its bisector line. An observer is at a perpendicular distance of ‘3d’ from that mirror. If the observer is walking parallel to the mirror, upto what maximum possible distance be can observe the image of the object

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a

4 L

b

 3 L

c

2 L

d

5 L

answer is C.

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Detailed Solution

Question Image

L2d=y3d

y=3L2

Total distance =3L2+3L2+L=3L+L=4L

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