JEE MAIN - Physics (2023 - 8th April Morning Shift - No. 25)
Two vertical parallel mirrors A and B are separated by $$10 \mathrm{~cm}$$. A point object $$\mathrm{O}$$ is placed at a distance of $$2 \mathrm{~cm}$$ from mirror $$\mathrm{A}$$. The distance of the second nearest image behind mirror A from the mirror $$\mathrm{A}$$ is _________ $$\mathrm{cm}$$.
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คำตอบ
18
คำอธิบาย
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Object distance $=8 \mathrm{~cm}$ [For image by $B]$
$$ \begin{aligned} \Rightarrow \text { Required distance } & =8+8+2 \mathrm{~cm} \\\\ & =18 \mathrm{~cm} \end{aligned} $$