Write a paragraph describing how you use mirrors everyday.

Decorating

Because mirrors reflect light, they create an illusion of open space by doubling whatever is in a room. Interior decorators use mirrors to make rooms feel larger and more inviting than they truly may be. Certain styles of mirrors may give a room a certain atmosphere based on their appearance. Additionally, decorators may use lenses to reflect light or add color. They may place candles on mirrors to magnify the shimmering effect or use a series of prisms to create rainbows in a white room.

Safety

People use mirrors and lenses for safety. Auto manufacturers place mirrors on the sides of vehicles so a driver has a better scope of traffic. Security personnel may use mirrors to view areas of a parking garage.

Vision

Eye doctors use lenses to correct vision. The glasses or contacts they make redirect light into the eye in a specific way so that a person's retina can produce a clearer image of an object the person sees.

Magnification and Science

Scientists use lenses and mirrors in tools such as telescopes and microscopes. This lets the scientist investigate objects that are extremely small or which are too far away for people to see well without assistance.

Energy and Affirmation Techniques

Some people use mirrors in energy and affirmation techniques. In Feng Shui, mirrors are supposed to help direct the flow of energy through a building, thereby relieving stress and opening the individual to positive feelings and experiences. People also look into mirrors and recite positive sayings to gain self-confidence.

Photography

Even though many photographers rely on digital imaging as of 2010, even digital cameras still use a traditional lens. The quality of the lens is in part what influences the quality of the photographer's images, since the lens directs light into the camera.

Fashion Design

Fashion designers use mirrors to look at their clothing or accessories from multiple angles at once. This helps them judge the overall impact and practicality of the design. Even department stores often have three-way mirrors so that customers can study the way clothing fits before purchasing the item.

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Concave Lens Uses



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Updated March 13, 2018

By Petra Turnbull

A concave lens -- also called a diverging or negative lens -- has at least one surface that curves inward relative to the plane of the surface, much in the same way as a spoon. The middle of a concave lens is thinner than the edges, and when light falls on one, the rays bend outward and diverge away from each other. The image you see is upright but smaller than the original object. Concave lenses are used in a variety of technical and scientific products.

Binoculars and Telescopes

Binoculars and telescopes employ convex lenses to magnify objects and make them appear closer, but convex lenses don't transfer light accurately; they create distortions and blurs. Binocular and telescope manufacturers therefore install concave lenses in or before the eyepieces to help focus images more clearly for the viewer.

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.

Cameras

Camera manufacturers use combinations of concave and convex lenses to improve the quality of photographs. The primary lens of a camera is convex, and when used alone, it can cause distortions in the photographs called chromatic aberrations. A convex lens, on the other hand, refracts light of different colors at different angles, creating a fringe effect around bright objects in the picture.

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. Small concave lenses can widen a laser beam to precisely access a specific area. Concave lenses used with lasers are made from fused silica to withstand the ultraviolet rays produced by the light source.

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.

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