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10 Uses of Concave Mirror
A curved mirror is one with a curved reflective surface. It can be either convex or concave. Concave mirrors are the one that are bulging inward. It is also known as converging mirror.
The concave mirrors are called converging because as light falls on the mirror, it collects the light and refocus the parallel incoming rays. Here we will briefly explain the 10 uses of concave mirror. There can be more uses as well, but we would take up major 10 uses of concave mirror only in this section.
10 Uses Of Concave Mirror
We will now explain the major 10 uses of concave mirror below:
1. One of the important applications of a concave mirror is in satellite dishes. These antennas are designed to first receive and then amplify (increase) the weaker signals that are sent in space via communication satellites. As the distance is very large, the waves reaching the earth from the antennas are in parallel. Thus when these parallel waves strike a concave surfaced mirrored antenna dish, they all get reflected by the focus of the concave mirror. At that focus the receiver for the signals is placed. Here, the purpose of mirror is to gather weaker signals falling over a bigger area and them concentrate or focus them on one point or spot.
2. Another major application of concave mirrors is in headlights of the car. A powerful source of light in a smaller size is placed at the focus point of the concave mirror which is placed at the back of the headlight. Then any light from the focus that will strike the mirror will get reflected in parallel to the axis of the concave mirror. Thus the beam of headlight gets focused in this way.
3. One more application of concave mirrors is in telescopes used for astronomical studies. All telescopes may them be large or small, use concave mirror in accordance to the size of the telescope. If telescope is large a bigger mirror is used, for smaller ones small mirror is used. The mirror is placed at the bottom of the telescope such that it can gather light and form a smaller image than the original size of the image on a small and plane mirror placed at the top. This plane mirror is simply placed to reflect the light into the eyepiece or camera or other output source of the telescope. Astronomers use larger mirrored telescope because it gathers more light and fainter objects can then easily be viewed.
4. Shaving mirrors are another example that makes use of concave mirrors because of their curved and reflective surface.
5. Dentist and ENT doctors also use concave mirrors in their examinations procedure to obtain a larger image than the original of teeth, ear or skin etc.
6. Concave mirrors are also used in torches on the same principle as they are used in vehicles headlights.
7. They are also used in solar powered gadgets. The parallel rays of the sun are focused at the focal point of the mirror and then the reflected rays are used for heating purposes like cooking, heating water, recharging power backups etc.
8. They are used in electron microscopes and magnifying glasses to get a larger view of smaller objects under study.
9. Another use of concave mirror is in visual bomb detectors.
10. The flash light mirror of camera also makes use of concave mirrors.
These are the 10 uses of concave mirrors in common practice.