Question
If the image formed by a mirror for all positions of the object placed in front of it is always erect and diminished, what type of mirror is it ? Draw a ray diagram to justify your answer. Where and why do we generally use this type of mirror ?
Solution
The image formed by a convex mirror is always erect and diminished. Therefore, the given mirror is a convex mirror.
Let, the object be placed between the pole (P) and infinity in front of a convex mirror.
Convex mirrors is used as rear view mirrors in vehicles because it gives a wide field of view and the image formed is always virtual, erect and diminished image.
Thus, it enables the driver to view a much larger area of the traffic behind.
