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Q.

An object is placed at a distance of 12 cm in front of a plane mirror. The virtual and erect image is formed by the mirror. Now the mirror is moved by 4 cm towards the stationary object. The distance by which the position of image would be shifted, will be

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a

4 cm towards mirror

b

8 cm away from mirror

c

8 cm towards mirror

d

2 cm towards mirror

answer is C.

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Detailed Solution

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 Initial image distance =V1=12cm Shift in the image Δx=12(84)=8cm towards mirror 

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