When light called the incident ray hits a mirror at any angle, it reaches 0˚ called the Normal line. The light bounces back at the same angle it entered but on the opposite side of the Normal.
The light rays hitting concave mirror reflects back and converge at a point in front of it called the Focal Point. And beyond that point when the when rays comes to our eyes than due to convergence the objects looks bigger in size than its actual size. Due to this concave mirrors are used in back-view mirror in vehicles.
