The mirrors used as rear-view mirrors in vehicles are

The mirrors used as rear-view mirrors in vehicles are

  1. concave
  2. convex
  3. cylindrical
  4. plane

Answer

An image formed in a convex mirror is smaller than an image in a plane mirror. Because the image is smaller, more images can fit into the mirror, so a convex mirror provides for a larger field of view than a plane mirror. So, they are used whenever a mirror with a large field of view is needed. For example, the rear view mirrors in vehicles use convex mirror.

The correct option is B.