Discussion
Manjula is observing her image in a plane mirror. The distance between herself and the mirror is 5 m. She moves 1 m towards the mirror. The distance between herself and her image now is
Answer: C
The distance between Manjula and her image is 8 m.
A plane mirror forms the image as far behind the mirror as the object is in front of it. After moving 1 m closer, Manjula is 5 − 1 = 4 m from the mirror, so her image is 4 m behind it.
\[ \text{distance} = 4 + 4 = 8\ \text{m} \]
4 m is only her distance from the mirror, 10 m is the original distance before she moved, and 1 m is how far she moved.
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