The size of the image is smaller than that of the object. In this case no image will formed because the refracted rays are parallel and never meet. However, in case the object is very near to the lens then the resultant image is virtual, erect, and magnified. While the real and inverted image is formed from a convex lens. The size of the image is smaller than that of the object. When a ray, passing through focus strikes concave or convex lenses, the reflected ray will pass parallel to the principal axis. 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When an object is placed behind the center of curvature, the real image is formed between the center of curvature and focus. So, lenses formed by binding two spherical surfaces bulging outward are known as convex lenses while the lenses formed by binding two spherical surfaces such that they are curved inward are known as concave lenses. When an object is placed at the focus, a real image is formed at infinity. The size of the image is much smaller than that of the object. Here, Object AB is at 2F 1. The size of the image is much smaller than that of the object. What is Difference Between Heat and Temperature? When a ray strikes concave or convex lenses obliquely at its pole, it continues to follow its path. We draw another ray which passes through… You overcome suffering, it is your wealth; suffering overcomes you, it is your humiliation, Your email address will not be published. In this article, we will learn about image formation by concave and convex lenses. The ray parallel to the principal axis passes through the focal point after. The concave lenses are used to cure myopia while the convex lens corrects hypermetropia. Fig. What do you mean by Thermal conductivity? Case 3:When object is placed between F and 2F In this case image will form beyond the 2F,also image will be real,inverted,larger than the object. When an object is placed in between the center of curvature and focus, the real image is formed behind the center of curvature. Basically, convex lens gives a clearer and larger image of an object by focusing the light beam at one point. Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens while the concave lenses are known as diverging lenses as the rays diverge after falling on the concave lens. How to find Vernier caliper least count formula? The ray passing through optical centre passes straight through the lens and remains undeviated. Save my name, email, and website in this browser for the next time I comment. The size of the image is much smaller than that of the object. In this case image will form between F and 2F, image will be real, inverted, smaller than the object. When an object is placed at infinity, the real image is formed at the focus. It is used in eyeglasses to give clear images. Image formed by a convex lens when the object is placed at infinity When the object is placed at infinity, the two rays AO and BD running parallel to the principal axis get refracted at point O and D respectively and intersect each other at the principal focus. When an object is placed behind the center of curvature, the real image is formed between the center of curvature and focus. As the center of the convex lens is thicker, it makes the object image at the focus point look larger and closer. Why diffraction grating have closely spaced rulings? When an object is placed in between focus and pole, a virtual image is formed. Uses of the Convex Lens: There are following uses: It is used as Hypermetropedia i.e. How many Types of Multivibrators Are There? Image formation by concave lens ray diagrams, Image formation by convex lens ray diagrams, Reflection of Light Examples in daily life, Polarization of light:definition,types,uses and examples, difference between fresnel and fraunhofer diffraction in tabular form. The ray passing through optical centre passes straight through the lens … When an object is placed at a finite distance from the lens, a virtual image is formed between the pole and the focus of the convex lens. This is explained with the help of ray diagrams as follows: Image formation in a convex lens can be explained with the help of three principal rays shown in the figure. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. The ray parallel to the principal axis passes through the focal point after refraction by the lens. When a ray, parallel to the principal axis strikes concave or convex lenses, the reflected ray passes through a focus on the principal axis. When an object is at the center of curvature, the real image is formed at the other center of curvature. Image formation by convex and concave lens ray diagrams. long-sightedness. This is one of the basic difference between concave and convex lenses. The image is formed at focus F 2.It is real and point sized. Convex lens point object at infinity, image at focus. When an object is placed at infinity, a virtual image is formed at the focus. 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