Question

Two plane mirrors $A$ and $B$ are parallel to each other and spaced $20cm$ apart. An object is kept in between them $15cm$ from $A$. Out of the following at which point is an image not formed in mirror $A$ (distances measured from the mirror $A$ )

• A. 15 cm
• B. 25 cm
• C. 45 cm
• D. 65 cm

Answer 1

Answer: (C)

From $A$
$I$ is at $15cm$
$I^{\prime }$ is at $25cm$
$II$ is at $25cm$
$I{I}^{\prime }$ is at $45cm$ and so on.
The distance of $45cm$ from $A$ for any image is absent.