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Plane mirrors don't form real images. Concave mirrors and convex lenses do.
Without a real image, you have nothing to expose film to, nothing to project
onto a screen, nothing to capture on a CCD or vidicon, and nothing to look at
with an eyepiece.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoIn order to gather as much light as possible (the goal of telescopes), telescopes must be built larger. Larger lenses eventually start to sag under their own weight, diminishing their ability to focus light effectively. Also, multiple lenses must be used to focus light in the same place, and each lens surface must be ground and polished individually. This increases the cost. A mirror can easily be supported underneath, and only requires a single surface to be ground and polished. Therefore, for both optical and economic reasons, mirror-based telescopes are both the best for focusing light and the most cost-effective in larger apertures.
Wiki User
∙ 11y agoConcave mirrors produce images similar to the images produced by convex lenses: upright and smaller than the object.
Wiki User
∙ 13y agobecause for you could look more closer
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Do refracting and reflecting telescopes use visible light to view the images?
Those terms are most commonly used for optical telescopes. However, the same design can be used for non-visible frequencies; for example, radio telescopes of the "satellite dish" variety are essentially reflecting telescopes.
What is the size of Lord Rosse's telescope lenses?
Lord Rosse's telescopes actually used mirrors rather than lenses. His four biggest telescopes were 15 inches, 24 inches, 36 inches and 72 inches.
What is used in a telescope to reflect light?
Reflecting telescopes use mirrors to collect light.
What are the uses of regular reflection?
If light didn't reflect off objects, you wouldn't be able to see them. Mirrors are used as coherent reflectors of received light. Mirrors can be used in periscopes to see around corners, or just on their own to see what one looks like.
What type of lens is used in the eyepiece for reflecting telescopes?
A radio telescope is a reflecting telescope, and uses a mirror rather than a lens. Since radio waves are so much longer than light waves, the 'mirror' of a radio telescope is the 'dish' reflector that focuses radio waves onto its antenna, located at the prime focus of the dish.
Application for concave mirror and convex mirror?
Concave mirrors are used in telescopes. Convex mirrors are used as side-view mirrors in cars.
What reasons you use concave mirrors?
Concave mirrors are used as the primary mirror in Newtonian and Dobsonian telescopes for astronomy observations. Concave mirrors are also used in mirror lenses for cameras.
Uses of reflection?
The largest use is in mirrors, which are used everyday in houses, cars, and telescopes.
Why are mirrors used in?
There are usually two to three mirrors in a scanner and they are slightly curved so to reflect the image onto a smaller surface.
What type of mirror would be used for the solar heating of water?
Focusing Curved mirrors
What is the function of concave mirror?
Concave mirrors focus light inward to one focal point. They are often used in telescopes and to magnify the face in makeup mirrors.
Why are mirrors used in scanners?
There are usually two to three mirrors in a scanner and they are slightly curved so to reflect the image onto a smaller surface.
Do refracting and reflecting telescopes use visible light to view the images?
Those terms are most commonly used for optical telescopes. However, the same design can be used for non-visible frequencies; for example, radio telescopes of the "satellite dish" variety are essentially reflecting telescopes.
What is the use of concave mirror?
They are used as dentists' mirrrors to magnify the image of a patients teeth to faciliate the examination.They are used as cosmetic mirrors to have an enlarged view of the face to apply make up or to shaveUsed as source of fire.They are useful in projector lamps.They are used in telescopes.headlights of carsreflectors in flash-lights
The uses of convex and concave mirrors?
Convex mirrors are used in the rear view mirror of cars because they give an erect and virtual image of the traffic behind. They let us see a wider view of the traffic. Concave mirrors are used by the dentists to see a larger image of our teeth. They are used as solar furnaces to reflect the light on the focus .They are even used in shaving mirrors. concave mirrors are used in reflector type telescopes. Concave mirrors are used by doctors to focus light into ears,throat etc. concave mirrors are used to focus light for heating purposes.
Uses of a mirror?
We use mirrors in everyday life like car rear view mirrors and side mirrors. Periscopes- auto mechanics use mirrors held on rods so they can examine hard-to-reach places. Torches have curved mirrors for directing the beam of light. Searchlights, floodlights, and spotlights (used in theatres) have similar mirrors. In hairdressers so that the customer may see the result, front and back. To collect sunlight for solar power generation. You can also use them for reflecting light, like a disco ball. Light houses. We can also use mirrors for telescopes, Morse code and the most simple to see ourselves.
What is a convex mirror and what is it used for?
Convex mirrors are also curved mirrors, but the silvered surface bulges outward instead of inward, as with the concave spherical mirror. As with all mirrors, the angle of incidence of a ray of light is equal to the angle of reflection with respect to a normal on the surface. On a curved surface the normal changes with the curvature. Therefore, the light rays will diverge from the object. If the rays of light are extrapolated back to the point where they converge, this will be the point where the image is formed. For reflections off a convex mirror, the image is virtual and upright. Use of Convex Mirrors: Convex mirrors are often used in car wing-mirrors because they have a greater field of view than a similar plane mirror. However the greater field of view is at the expense of making objects seem further away than they are in reality. Hence the expression seen etched on to the mirrors, 'Objects in Mirror are Closer than they Appear'. Concave mirrors are also used as security mirrors as they enable the viewer to see over a greater region of space another use for this mirror is used in making sunglasses and telescopes. bet you didn't know that did u ???
