Question

why do we prefer a convex mirror as a rear-view mirror in the vehicles?

Answer 1

the vision area of convex mirror is big comparison to concave mirror. and it make the object image smaller then the other mirror.

Answer 2

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as We prefer a convex mirror as a rear-view mirror in vehicles because it gives a wider field of view, which allows the driver to see most of the traffic behind him. Convex mirrors always form a virtual, erect, and diminished image of the objects placed in front of it.