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Because they alter the focus of the lens in the patients eye, to correct their vision.
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∙ 13y ago
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What type of lens are used in spectacles?
concave or convex lenses are used depending upon the eye power whether your eye power is positive or negative.
Where are lens are used?
Lens are widely used. The most common example of the usage of lens is the spectacles. The spectacles contain either convex or concave lenses. In some cases it is plane. Convex Lens are widely used in Magnifying glasses, Microscope and Telescopes. Convex lens are used in torch lights. It helps in concentrating the light rays emitted from the bulb to a point, hence increasing the intensity of light at that point.
What are concave lens uses?
Concave lenses are used in spectacles used by those having short sight (myopia). Some are also used in high quality telescopes and binoculars. While some are used along with convex lenses like eyeglasses
What are the uses of a concave lens?
Two uses of concave lenses are: 1. Used to make spectacles for people who cannot see short distance objects. 2. Used in peep hole to make the image of the person standing in the hallway appear smaller.
Which lens is used in a magnifying glass?
it is used in a concave lens
What type of lens are used in spectacles?
concave or convex lenses are used depending upon the eye power whether your eye power is positive or negative.
Where are lens are used?
Lens are widely used. The most common example of the usage of lens is the spectacles. The spectacles contain either convex or concave lenses. In some cases it is plane. Convex Lens are widely used in Magnifying glasses, Microscope and Telescopes. Convex lens are used in torch lights. It helps in concentrating the light rays emitted from the bulb to a point, hence increasing the intensity of light at that point.
Are spectacles concave or convex lens?
They are convex, or rounded outward. The title is given from where you view through them - from convex to concave. The image is in focus from this direction
What are concave lens uses?
Concave lenses are used in spectacles used by those having short sight (myopia). Some are also used in high quality telescopes and binoculars. While some are used along with convex lenses like eyeglasses
What is a sentence for concave lens?
A Concave lens is used to correct short- sightedness.
What are the uses of a concave lens?
Two uses of concave lenses are: 1. Used to make spectacles for people who cannot see short distance objects. 2. Used in peep hole to make the image of the person standing in the hallway appear smaller.
Which lens is used in a magnifying glass?
it is used in a concave lens
Which lens is a converging lens a double-convex lens or a spherical-convex lens or a plano-concave lens or a convexo-concave lens?
Your are mixing properties. Converging lens is always thicker in the centre and thinner at the edges. The other cathegory is the geometry of shape of the surfaces of the lens. Convex means that the shape is similar to the outer surbace of a sphere, concave means that the shape is similar to the iner surface of a sphere (or: convex = lower side of a spoon as we use it for sampling a soup; concave: upper (inner) shape of the spoon). A double convex lens is always a converging lens. A plano-concave lens is always a diverging (not converging) lens. A convexo-concave lens is the most usual shape of a lense used in spectacles. It can be either converging or diverging, depending on the radii of the surfaces.
What is concave lens?
a lens that caves in like this )( as opposed to convex which puffs out like this (). a concave lens. it is used to bend and focus light
What is a difference between concave mirror and concave lens?
A concave mirror is usually used to project something onto a screen. A concave lens is usually used to view an image through the naked eye.
A lens that curves outward is called?
)( is a concave lens() is a convex lens
What is a convex and a concave lens?
CONCAVE LENS : lens that atleast possess one end inwards is called as concave lens. CONVEX LENS : lens that atleast possess one end outwards like the exterior of the sphere is called convex lens. According to the medical values convex lens are used for long sight vision problem and concave lens for short sight vision problems.
