Given a plane mirror, a point
object (P) and the position of an observer’s eye, determine whether or not the observer can see object point P.
Next, we draw a
Next, since the image distance equals the object distance,
If this line intersects the mirror,
the observer can see the image.
If this line does not intersect the mirror,
the observer cannot see the image.
Look! The line does not intersect the mirror.
The observer cannot see the image.
Object distance = Image distance