Convex Lenses When an object is placed at infinity, the real image is formed at the focus. As the center of the convex lens is thicker, it makes the object image at the focus point look larger and closer. What is Difference Between Heat and Temperature? When a ray, parallel to the principal axis strikes concave or convex lenses, the reflected ray passes through a focus on the principal axis. The ray passing through optical centre passes straight through the lens … The size of the image is smaller than that of the object. 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When an object is placed in between focus and pole, a virtual image is formed. Here, Object AB is at 2F 1. Uses of the Convex Lens: There are following uses: It is used as Hypermetropedia i.e. It is projected in front of the lens and can be captured on a screen. Convex lens is used for various purposes like in a magnifying glass, camera, microscope, correction of Hypermetropia, etc. How to find Vernier caliper least count formula? When an object is placed at infinity, a virtual image is formed at the focus. The size of the image is the same as compared to that of the object. Fig. Your email address will not be published. What are some examples of refraction of light? Case 2:When object is placed at 2F In this case image will form at 2F, also image will be real , inverted, the same as the size of the object. The size of the image is smaller than that of the object. While the real and inverted image is formed from a convex lens. The concave lenses are used to cure myopia while the convex lens corrects hypermetropia. Why diffraction grating have closely spaced rulings? Real Image: A convex lens can be used to produce a real image, and this occurs if the object is located at a position of more than one focal length from the lens. 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. In this case no image will formed because the refracted rays are parallel and never meet. long-sightedness. Due to the thicker centre of convex lenses, the objects are seen larger and closer. 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. Image Formation By Convex Lens in Different Cases Case 1: Object at Infinity A point object lying on the principal axis: Rays come parallel to the principal axis and after refraction from the lens, actually meet at the second principal focus F 2. When an object is placed behind the center of curvature, the real image is formed between the center of curvature and focus. Lenses are used for the correction of issues related to vision. 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. The ray passing through the focal point becomes parallel to the principal axis after. When an object is placed behind the center of curvature, the real image is formed between the center of curvature and focus. When a ray, passing through focus strikes concave or convex lenses, the reflected ray will pass parallel to the principal axis. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. Image formation in a convex lens can be explained with the help of three principal rays shown in the figure. The ray parallel to the principal axis passes through the focal point after. However, in case the object is very near to the lens then the resultant image is virtual, erect, and magnified. It is used to the movie theater, projector etc. Virtual Image: A convex lens will produce a virtual image if the object is located in front of the focal point. This is one of the basic difference between concave and convex lenses. Bernoulli equation derivation with examples and applications, Continuity equation derivation in fluid mechanics with applications, Newton’s law of universal gravitation formula, Newton’s First law of Motion Examples in Our Daily Life, Newton’s Second Law Definition and Formula, Newton’s Third Law of Motion Examples in Daily Life, Newton’s three laws of motion with examples and applications, Ampere’s law and its applications in daily life, Formula for ohm’s law with example and problems. 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. Required fields are marked *. In mirrors, images are formed through reflection but lenses form images through refraction.