An object is placed at a distance of 12 cm in front of a plane… | JEE Main 2023 (10 Apr, Shift 1)

Q23JEE Main 2023 · 10 APR · SHIFT 1Easy

Reflection & Mirrors

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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Answer: (d)

Before: object 12 cm from the mirror, image 12 cm behind it, i.e. 24 cm from the object.
After moving the mirror 4 cm closer: object distance 8 cm, image 8 cm behind it, i.e. 16 cm from the object.
The image moves $24 - 16 = 8\text{ cm}$ (twice the mirror's shift), in the same direction as the mirror.
So the answer is (d) 8 cm towards the mirror.

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Reflection & Mirrors question from JEE Main 2023 (10 Apr, Shift 1)

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