write any two applications of lens
Answers
Answer: LENS are use all around as. it is ia used inour spectacles , magnifying glasses , in CAMERA , microscopes and telescope,
Explanation:
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Answer:
Explanation:
Concave lens
Used in telescope and binoculars
Concave lenses are used in telescope and binoculars to magnify objects. As convex lens create blurs and distortion, telescope and binocular manufacturers install concave lenses before or in the eyepiece so that a person can focus more clearly.
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.
convex lens
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 camera to not only focus 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 magnification level of the image is controlled by the first lens 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.