When light passes through the lens, it bends the light rays towards each other. Your email address will not be published. A concave lens exhibits a cave-like structure from the outside as it has a thinner middle portion and thick edges. But, a convex lens is used in lasers, flashlights of vehicles as well as peepholes of doors. So, when the light rays pass through it then despite bending towards a single point, it disperses. Pro Lite, CBSE Previous Year Question Paper for Class 10, CBSE Previous Year Question Paper for Class 12. 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. A type of optical lens whose surface is bulged in an outward direction making the center thicker than the edges. As the parallel rays converge, the convex lens is termed as a converging lens. 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. It is thin at the center and thick at the edge. 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. 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. However, in the convex lens, the edges are comparatively thinner than the center of the lens. Save my name, email, and website in this browser for the next time I comment. Thus, the concave lens is also known as a. 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. As the rays diverge in the case of concave lenses thus, their focal length is negative. 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. Thus, concave lenses are diverging in nature. Thus, its focal length is positive. 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. Required fields are marked *. When a light ray falls on the surface of the lens then it bends the light rays passing parallel to its principal axis. All those devices which can focus a light beam are known as lenses, for e.g. Its outer surface somewhat resembles a cave. The crucial difference between concave and convex lens is that a concave lens diverges the light rays that incident on its surface. A lens is an optical device that converges or diverges a ray of light by means of refraction. Difference between Concave and Convex lens A lens is an optical device that converges or diverges a ray of light by means of refraction. Similarly, a concave lens is called diverging lenses because they cause parallel rays to diverge. Lens in human eye, microscope, telescope, etc. 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 It is used to correct long-sightedness or hypermetropia. These two lenses are also differentiated on the basis of shape possessed by them. It is called positive lens because of its positive focal length nature. 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. 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. The concave lens is called a negative lens because of its negative length nature. Unlike a prism, a lens can focus a ray of light to form an image, while prism simply refracts the light beam without focusing.

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