what are the uses of concav and convax lens write five Points
Answers
Answer:
Uses of convex mirror:
It is used in supermarkets and stores for surveillance.
it is used as rearview mirror in automobiles. this is due to the reason that a convex mirror provides a wider field of view than a plane or concave mirror.
Used in magnifying glasses
One of the most direct and simplest uses of convex lens is in a magnifying glass. As the light rays enter the convex lens of the magnifying glass, it becomes focused on a specific focal point in front of the center of the lens. Once the magnifying glass is in the optimal distance. The focal point will reach the object, therefore maximum magnification of the object will be generated.
Convex lens used in eyeglasses
A person can become farsighted or nearsighted as the eye lens fails to focus the light on the retina properly. The lens of a person who is suffering from farsightedness focuses the image far behind the retina. Therefore, it causes difficulty for the person to focus on the objects that are close to the eye. A convex lens, when placed in front of the eye, bends the light rays which shortens the focal point and the light focuses on the retina in a proper manner.
Uses of convex lens in cameras
Convex lenses are used widely in the camera, not only focus on an image but also to magnify it. Almost all lenses of cameras consist of a convex lens followed by a concave lens, followed by a second convex lens. The first lens controls the magnification level of the image by moving away from or towards the object.
Used in microscopes
Microscopes use a convex lens to generate extremely magnified images of very small objects. Simple microscopes mostly consist of three lenses. The lens at the end of the simple microscope produces an inverted and magnified image.
Uses of concave mirror:
It is used in torches.
They are used in headlights of vehicles to send parallel rays to infinity , in shaving mirror to get an enlarged image of the face and also by dentists to see a bigger image of the tooth / teeth .
Glasses
Opticians use concave lenses to correct nearsightedness -- also called myopia. A nearsighted eyeball is too long, and the image of a far-away object falls short of the retina. Concave lenses in glasses correct this shortfall by spreading out the light before it reaches the eye, thereby enabling the person using them to see distant objects more clearly.
Flashlights
Concave lenses are used on flashlights to magnify the light produced by the bulb. The light falls on the concave side of the lens, and the rays diverge on the other side, thereby increasing the apparent radius of the light source and providing a wider beam.
Lasers
Various types of medical equipment, scanners and CD players use laser beams, and because these are highly focussed, they must often be dispersed in order for the equipment to work properly.
Peepholes
Door viewers, or peepholes, are small security devices that provide a panoramic view of objects and environments outside doors or walls. The view is created through the use of one or more concave lenses inside the device which minimizes the proportions of specific objects and gives a wide overview of an entire area.