Q.

A small object is placed 10 cm in front of a plane mirror. If you stand behind the object 30 cm from the mirror and look at its image, the distance focused for your eye will be

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a

20 cm

b

60 cm

c

80 cm

d

40 cm

answer is C.

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Detailed Solution

See following ray diagram

Question Image

The distance focussed  for eye = 30 + 10 = 40 cm

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