Two vertical parallel mirrors A and B are separated by 10 cm. A point object O is placed at a distance of 2 cm from mirror A. The distance of the second nearest image behind mirror A from the mirror A is _________ cm. Numerical answer type. Work it out, then open the answer.

Answer: 18. Place A at x = 0, B at x = 10, O at x = 2. Nearest image behind A: image of O in A at x = -2. Image of O in B is at x = 18; its image in A is at x = -18. Second nearest image behind A is 18 cm from A.

Two vertical parallel mirrors A and B are separated by 10 cm. A point… | JEE Main 2023 (8 Apr, Shift 1)

Q25JEE Main 2023 · 8 APR · SHIFT 1Medium

Reflection & Mirrors

Two vertical parallel mirrors A and B are separated by $10\text{ cm}$ . A point object $\text{O}$ is placed at a distance of $2\text{ cm}$ from mirror $\text{A}$ . The distance of the second nearest image behind mirror A from the mirror $\text{A}$ is _________ $\text{cm}$ .

Numerical answer type. Work it out, then open the answer.

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Answer: 18

Place A at $x = 0$ , B at $x = 10$ , O at $x = 2$ .
Nearest image behind A: image of O in A at $x = -2$ .
Image of O in B is at $x = 18$ ; its image in A is at $x = -18$ .
Second nearest image behind A is $18\text{ cm}$ from A.

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Reflection & Mirrors question from JEE Main 2023 (8 Apr, Shift 1)

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