Question

An very tall mirror is placed vertically with its centre at $(-2,3)$ facing the left and a point object is placed at $(-5,1)$. What are the coordinates of the image?

• A. $(-1,3)$
• B. $(1,1)$
• C. $(7,3)$
• D. A reflection is not formed

Answer 1

The correct option is B $(1,1)$

The Y coordinate of the centre of the mirror doesn't matter.

The mirror is vertical, so the Y coordinate of the object and the image will be the same for a plane mirror.

The distance between the object and the mirror is $-2-(-5)=3$
So, the X coordinate of the image will be $-2+3=1$

So the coordinates of the image is $(1,1)$.