Question 294: Ray Optics

Question

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 _________ $$\mathrm{cm}$$.

Accepted Answer

Object distance $=8 \mathrm{~cm}$ [For image by $B]$
$$
\begin{aligned}
\Rightarrow 	ext { Required distance } & =8+8+2 \mathrm{~cm} \\
& =18 \mathrm{~cm}
\end{aligned}
$$

Ray Optics

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

Choose the correct answer: