why a convex mirror is used as rear view mirror

because it gives a wider field of view as it is curved outwards

Convex mirror is used as rear view mirror as it gives a clear diminished and an erect image of the traffic that is behind you. It covers a wide range of the traffic behind you and gives a very clear image. 
Just imagine the fact that you are using a concave mirror. Everything behind you will be enlarged and tilted from the original position and you can’t see the actual traffic behind you. Even a plain mirror is not used as it does not cover a wide surface for the traffic. Convex Mirror forms image on its negative side (Back side or other side of mirror) and is Virtual Image. Image is NOT Tilted by 180, i.e., Head-Head, Head-Head. Concave Mirror forms image on its positive side (Towards your eyes, completely defocused), Real Image and Image Tilted by 180(Head-Tail, Tail-Head) 

Because the image is smaller, more image can fit onto the mirror, so a convex mirror provides for a larger field of view than a plane mirror. This is why they are useful. They are used whenever a mirror with a large field of view is needed. For example, the passenger-side rear view mirror on a car is convex.

hey guys at what position?

yeah thats right

Convex mirror is used as rear view mirrow as it gives a clear diminished and an erect image of the traffic that is behind you.It covers a wide range of the traffic behind you and gives a very clear image . 
Just imagine the fact that you are using a concave mirror . Everything behind you will be enlarged and tilted from the original position and you cant see the actual traffic behind you . Even a plain mirror is not used as it does not cover a wide surface for the traffic. 
Hence, a convex mirror is used .

A CONVEX MIRROR IS USED AS REAR VIEW MIRROR AS APPORVA

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Covex mirror is used as a rear-view and side-view mirror because of the following reasons:
* It forms an erect though diminished image.
* It has a wider field view since it is curved outward. Therefore, it allows the driver to see a larger area than would be possible by a plane mirror.

Convex mirrors are commonly used as rear-view (wing) mirrors in vehicles because they give an erect, virtual, full size diminished image of distant objects with a wider field of view. Thus, convex mirrors enable the driver to view much larger area than would be possible with a plane mirror.

A convex mirror is used as rear view mirror because they form erect, virtual, and diminished images which allow the driver to view a large area in a small mirror...............,😎😎😎😎😎😎😎

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Explain why convex mirror is used as rear view mirror