Concave mirror is used in headlights of vehicles, because when the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity (longer distances). A concave mirror is a converging mirror as opposed to a convex mirror which is a diverging mirror.
Why do we use concave mirrors in car headlights and flashlights?
The light emanating from the bulb used in a flashlight or a car headlight spreads out is all directions. So we need something to ensure that most of the rays of light converge towards the desired direction. For this purpose we need a converging mirror and hence concave or parabolic mirrors are used.
What is the mirror formula?
Suppose an object is placed u cm in front of a spherical mirror of focal length f such that the image is formed v cm from the mirror, then u, v and f are related by the equation; 1/f= 1/u + 1/v. This equation is referred to as the mirror formula. The formula holds for both concave and convex mirrors.
Which mirror is used by doctors?
Answer: A concave mirror is used as a head mirror by the doctors to concentrate light coming from a lamp on to the body part of a patient ( like throat, ear and nose etc.) to be examined.
Why are curved mirrors used in car headlights?
At what position is bulb placed in it and why? Concave mirror is used in headlights of vehicles, because when the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity (longer distances). … A convex mirror always diverges the rays of light falling onto it.
Which mirror is used in Periscope?
Only plane mirrors are used for a simple periscope. An expanded view of the object is required for some distance visions, and therefore convex mirrors are helpful. An erect image is produced by a double reversal of the object. Convex mirrors can be used to view objects that are too close to each other.
Why are parabolic mirrors used in car headlights?
Correct Option: A
A concave mirror converges parallel light rays inward to the point of principal focus. … For this reason, parabolic mirrors are used as reflectors to focus light in telescopes, or to focus microwaves in satellite communication systems.
Which mirror is used in bike?
In Bikes And in All Vehicles Convex Mirrors are used to See distinct objects , which provides for a larger field of view than a plane mirror.
Do car headlights use concave mirrors?
Concave mirror are used in car headlamp. Concave mirror has converging power, it can concentrate the light ray at a particular point. And in night we want highly concentrated light beam for clear visibility. This is why concave mirror is used.
Where do we use concave mirrors?
Concave mirrors are used in headlights and torches. The shaving mirrors are also concave in nature since these mirrors can produce enlarged clear images. Doctors use concave mirrors as head mirrors to have a clearer view of eyes, noses, and ears. The dental mirrors used by dentists are also concave.