Why is a concave mirror used as reflector in torch light?

A concave mirror is used as a reflector in a torch light because it can focus light rays emitted from a point source, such as a bulb, into a parallel beam. This focusing ability enhances the intensity and directionality of the light, allowing for a more concentrated and powerful illumination. Additionally, the shape of the concave mirror ensures that the light is directed forward, maximizing the efficiency of the torch light.