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David is observing his image in a plane mirror. Die distance between the mirror and his image is 4 m.

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David is observing his image in a plane mirror. Die distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be

(i) 3 m

(ii) 5 m

(iii) 6 m

(iv) 8 m

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Correct option: (iii) 6 m

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