what is meant by convex lens and concave lens and define it uses
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Answer:
convex lens definition
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This type of lens is thicker at the center and thinner at the edges.
An optical lens is generally made up of two spherical surfaces. If those surfaces are bent outwards, the lens is called a biconvex lens or simply convex lens. These types of lenses can converge a beam of light coming from outside and focus it to a point on the other side. This point is known as the focus and the distance between the center of the lens to the focus is called the focal length of convex lens. However, if one of the surfaces is flat and the other convex, then it is called a plano-convex lens.
Uses of convex lens
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These are used for a variety of purposes in our day-to-day lives. For example,
The lens in the human eyes is the prime example. So the most common use of the lens is that it helps us to see.
Convex lens
Another common example of the use of this type of lens is a magnifying glass. When an object is placed in front of it at a distance shorter than the focal length of the lens, it produces a magnified and erect image of the object on the same side as the object itself.
It is used to correct Hypermetropia or long-sightedness.
It is used in cameras because it focuses light and produces a clear and crisp image.
More generally these are often used in compound lenses used in various instruments such as magnifying devices like microscopes, telescopes and camera lenses.
A simple kind of these lenses can focus light into an image, but that image won’t be of a high quality. For correcting the distortions and aberrations, it is better to combine both types of lenses.
aA concave lens is a lens that possess at least one surface that curve inwards
A convex lens is also called converging lens .A converging lens is a lens that converges ray of light that are travelling parallel to its principal axis