what is concave mirror please tell its uses and a perfect definations
Answers
concave mirror is a spherical mirror which has a bent in surface.
it shows magnified image and is used by dentists to see through the mouth, used in shaving mirrors etc.
A concave mirror is a mirror with a curved reflecting surface which is bulging inwards or curved inwards. It is also known as a converging mirror as this reflecting surface collects light incident on its surface, and reflects the parallel rays of light towards a common focus. It can be thought to have been made from the inside of a sphere which has been silvered on the inside.
•••• Uses of Concave Mirrors ••••
•Shaving mirrors: Objects which are reflected by concave mirrors have a magnified image produced on the mirror. The precision and uniformity required for shaving are helped by using a concave mirror which produces a magnified image of the skin and the hair.
•Headlights: A source of light is placed in the focal point of a mirror. The mirror reflects the light in a parallel beam to the axis of the mirror on to the road.
•Satellite dishes: Satellite antennas receive weak signals from the communication satellites via space. These signals or waves are almost parallel, and when they strike the concave surface of the antenna, they are reflected and converge on the focus of the antenna. Amplification of the signal thus occurs here, and a receptor placed at the focal point receives this amplified signal and transmits it further. The mirror thus works as a receptor and an amplifier.
IT IS ALSO USED IN MAKEUP MIRRORS, TELESCOPES, VISUAL BOMB DETECTORS, ETC...