But, a convex lens is used in lasers, flashlights of vehicles as well as peepholes of doors. On the opposite side of the lens from where the rays are falling. A lens is an optical device that converges or diverges a ray of light by means of refraction. Key Difference: Concave and convex are two basic types of lenses. A type of optical lens whose surface is bulged in an outward direction making the center thicker than the edges. While the real and inverted image is formed from a convex lens. Pro Lite, Vedantu Required fields are marked *. Key difference The main difference between convex lens and the concave lens is that the light rays which are passing through the convex lens will merge at a particular point known as a focal point while concave lens will diverge the light rays around that are passing through it. Difference between Concave and Convex Lens: Definitions Concave Lens Bound by two spherical surfaces this lens is thinner at the center and thicker at the edges. Difference Between Real Image and Virtual Image, Difference Between Reflection and Refraction, Difference Between Photodiode & Phototransistor, Difference Between Diffraction and Interference, Difference Between Optical fiber and Coaxial Cable, Difference Between Moving Iron & Moving Coil Instrument, Two Wattmeter Method of Power Measurement, Difference Between Static and Kinetic Friction, Difference Between Ductility and Malleability, Difference Between Physical and Chemical Change, Difference Between Alpha, Beta and Gamma Particles, Difference Between Electrolytes and Nonelectrolytes, Difference Between Electromagnetic Wave and Matter Wave, Difference Between Kinetics and Kinematics, Difference Between Synchronous and Asynchronous Counter, Difference Between Analog and Digital Signals. A concave lens is called as ‘Diverging lens’ or ‘Negative lens. Hence, the lens which is thicker at the centre and gets thinner as we move towards the edges is known as a convex lens, while the lens which is thinner at the centre and gets thicker as we move towards the edges is called as Concave lens. Let us first understand: A lens is known as an optical instrument that either converges or diverges the light beam that incidents on its surface by using the principle of refraction. In the concave lens, the path of the rays is traversed behind the lens so as to get the focal point. Main Difference – Concave vs. Convex Lens Lenses are transparent objects with a curved surface. Difference between Concave and Convex lens A lens is an optical device that converges or diverges a ray of light by means of refraction. Your email address will not be published. However, in the convex lens, the edges are comparatively thinner than the center of the lens. Basically, the curvature of the lens is responsible for the direction in which the ray bents, the amount with which it bents, and the material of formation. Due to the law of refraction, light rays bend as they enter and leave the lens. are some examples of the convex lens. An image cannot form on a screen in this case. The power of the lens is defined in terms of a measure of convergence or divergence, the lens introduces to the light rays that incident on it. When light passes through the lens, it bends the light rays towards each other. It is moulded in a way to refract the light rays in order to form an image. Here we will see how a concave lens is different from a convex. The concave lens spreads out the light when it passes through the lens. Pro Lite, Vedantu Generally, forms real and inverted image. All those devices which can focus a light beam are known as lenses, for e.g. Thus, the concave lens is also known as a. By curving the lens in a specific way, it is possible to bend beams of light according to specific requirements. It is called positive lens because of its positive focal length nature. However, in case the object is very near to the lens then the resultant image is virtual, erect, and magnified. Lens in human eye, microscope, telescope, etc. Concave and Convex are two types of lenses that possess variation in physical shape as well as their properties. Nearer and larger than the original entity. A concave lens is exactly opposite to a convex lens. These two lenses display distinct properties and have different applications according to the shape of the lens. Also, the direction of bending depends on the curvature and material. However, when a body is present in front of a convex lens then it appears in a way that it is present nearer and is of larger dimensions than the original body. Unlike a prism, a lens can focus a ray of light to form an image, while prism simply refracts the light beam without focusing. Due to the nature of the lens, the incident light rays either converges or diverges after passing … Your email address will not be published. These two lenses are also differentiated on the basis of shape possessed by them. The key factor of differentiation between a concave and a convex lens is that a concave lens, Due to the nature of the lens, the incident light rays either converges or diverges after passing through it. A lens can be divided into two types, based on its shape. So, as in the case of the convex lens as the center is thicker than the edges thus the ray of light passing through it gets bent in an inward direction towards a single point. Difference Between Concave and Convex Lens. In a concave lens, the center is quite thinner than the edges thus the curve is present in an inward direction. In convex lens, the centre of the glass piece is thick whereas the edges are thin. The lens which merges the light rays at a particular point, that travels through it, are a convex lens. So, when the light rays pass through it then despite bending towards a single point, it disperses. A convex lens is called as ‘converging lens’ or ‘positive lens’. Thus, its focal length is positive. A concave lens is a type of optical lens where the surface of the glass is curved in an inward direction making the center thinner than the edges. … It is used for the correction of hypermetropia. It is actually a piece of glass in an appropriate shape which is responsible for converging or diverging the light rays. The human eye, camera, telescope, microscope etc. It helps to magnify the things and make them look bigger. Thus, the above discussion between a concave and a convex lens concludes that both have different physical shapes and generates a different form of images when light rays incident on it thus have different applications. Save my name, email, and website in this browser for the next time I comment. Positive, hence another name used for it is positive lens. Convex Lens … A concave lens exhibits a cave-like structure from the outside as it has a thinner middle portion and thick edges. In the case of a concave lens, the body or object near it appears to be present at distant and is smaller than the actual one. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. Thus, concave lenses are diverging in nature. microwave lens, acoustic lens, etc. It is used to correct long-sightedness or hypermetropia. In concave lens, the centre of the glass piece is thin while the edges are thick. The concave lens is curved towards the outside. Similarly, a concave lens is called diverging lenses because they cause parallel rays to diverge. A convex lens focuses light rays, whereas a concave lens causes the light rays to diverge. Sorry!, This page is not available for now to bookmark. It is thin at the center and thick at the edge. As the rays diverge in the case of concave lenses thus, their focal length is negative. The single point towards which the rays bent is the focal point thus in the case of convex lenses, the focal point is present on the opposite side of the region from where the rays are falling. Vedantu academic counsellor will be calling you shortly for your Online Counselling session. The image from a concave lens is always virtual and erect. It is used to correct short-sightedness or myopia. A lens can be defined as a transparent material (like a glass) that has either an open curved surface or one flat surface or two curved surfaces. Farther and smaller than the actual entity. Its outer surface somewhat resembles a cave. The concave lens is called a negative lens because of its negative length nature. Thereby giving rise to the convergence of light rays hence, called a converging lens. Unlike a prism, a lens can focus a ray of light to form an image, while prism simply refracts the light beam without focusing. As the parallel rays converge, the convex lens is termed as a converging lens. NCERT Solutions for Class 12 Physics Chapter 5, NCERT Solutions for Class 11 Physics Chapter 2, NCERT Solutions for Class 11 Physics Chapter 6, NCERT Solutions For Class 12 Physics Chapter 4 Moving Charges and Magnetism, NCERT Solutions for Class 12 Physics Chapter 2, NCERT Solutions for Class 12 Physics Chapter 1, NCERT Solutions for Class 12 Physics Chapter 9, NCERT Solutions for Class 12 Physics Chapter 11, NCERT Solutions for Class 11 Physics Chapter 7, NCERT Solutions for Class 12 Physics Chapter 14, CBSE Class 12 Physics Magnetism And Matter Formula, CBSE Class 11 Physics Work, Energy and Power Formulas, CBSE Class 12 Physics Electric Charges and Fields Formula, CBSE Class 12 Physics Electrostatic Potential and Capacitance Formula, CBSE Class 12 Physics Moving Charges and Magnetism Formula, CBSE Class 12 Physics Ray Optics and Optical Instruments Formula, Class 11 Physics Revision Notes for Chapter 2 - Units and Measurement, Class 12 Physics Revision Notes for Chapter 5 - Magnetism And Matter, CBSE Class 11 Physics Systems of Particles and Rotational Motion Formulas, CBSE Class 12 Physics Dual Nature of Radiation and Matter Formula, Vedantu are the examples of the concave lens. On the contrary, a convex lens has the ability to converge the light rays passing through it. The crucial difference between concave and convex lens is that a concave lens diverges the light rays that incident on its surface. On the side of lens from where the rays are falling. Flash lights of vehicles, lasers and peepholes of doors. Negative, thus sometimes referred as negative lens. Convex lenses hold magnifying abilities thus are generally used in the lens of microscope and telescope, also, the human eye lens is concave in nature. Lights, flashlights, laser, binocular etc. The convex lens is curved towards the inside. This lens is thick at the center as compared to the edge. When a light ray falls on the surface of the lens then it bends the light rays passing parallel to its principal axis. We have already discussed that when light from an object incident on the surface of the lens then it gets bent. 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