Curve : Convex lenses are curved inward. Convex lenses round outward and cause light rays to converge. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in structure. But before that, let’s understand the main keywords related to these lenses. Glasses (to correct for short sight), spy holes in doors, some telescopes, back window of coaches, etc. Eight important differences between convex and concave lens are compiled in the article in tabular form. By curving the lens in a specific way, it is possible to bend beams of light according to specific requirements. Used for the correction of problem in long sight. The lens of a normal eye is a double convex lens. Key Difference: Concave and convex are two basic types of lenses.A convex lens focuses light rays, whereas a concave lens causes the light rays to diverge. Main Difference – Concave vs. Convex Lens. It is thinner in the middle and thicker at the edges. The focal length of a convex lens is positive, while that of a concave lens is negative. Therefore concentric lenses are sometimes referred to as divergent lenses. A convex lens is a converging lens. In contrast, the concave lens proves helpful in the treatment of myopia or shortsightedness. Light that passes through a convex lens can be focused on a surface like a screen. All those devices which can focus a … Also, we will learn about the types of lenses, and different types of images formed by these lenses. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2020, Difference Between | Descriptive Analysis and Comparisons, thank u for giving this information it is used for understanding the chapter.now i can answer for any question, I don't get it that concave mirrors form real image while concave lenses form virtual ,is it true I don't get it?can somebody help me. On the other hand, when the light rays go through the concave lens, it diverges the beams, i.e. Both of them have numerous uses. Lens is composed of translucent material which is responsible for image establishment after converging or diverging from that translucent material. Privacy, Difference Between Convex and Concave Mirror, Difference Between Real Image and Virtual Image, Difference Between Reflection and Refraction, Difference Between Rotation and Revolution. These types of lenses are thicker in the middle than in comparison to their edges. Thicker at the center, as compared to its edges. A convex lens focuses light rays, and therefore is also known as a converging lens. These lenses can either be the concave and convex lens. The lens which merges the light rays at a particular point, that travels through it, are a convex lens. Convex lens refers to the lens which merges the light rays at a particular point, that travels through it. Used For : Convex lenses are used to correct Long-Sightedness or Hypermetropia. Contents of the page. Difference between Concave and Convex lens A lens is an optical device that converges or diverges a ray of light by means of refraction. Difference Between Concave and Convex Lens Concave and Convex are two types of lenses that possess variation in physical shape as well as their properties. This question is for testing whether or not you are a human visitor and to prevent automated spam submissions. Convex lenses are thicker at the middle. microscope, simple telescope, glasses (to correct for long sight), magnifying glass, etc. Virtual, upright and smaller than the object between object and the lens. Generally, a convex lens forms a real image, but it can also create a virtual image when the object is in the middle of the focus and optical centre. Keywords Related to the Lens. 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 lesson provides a detailed insight into the difference between the concave lens and a convex lens in tabular form for easier understanding. Due to the law of refraction, light rays bend as they enter and leave the lens. In the convex lens, the curve is outward facing, whereas, in the concave lens, the curve faces inward. Concave lens are used in movie projectors to cause the image to spread. The structure of convex lens is like, thicker at the centre and thinner at the edges. Key Difference: Concave is used to describe any entity having an outline that curves inwards.On the other hand, convex is used to describe an entity having an outline or surface that bulges out. One such difference is the structure of convex lens is like, thicker at the centre and thinner at the edges. they spread out. A concave mirror is a spherical mirror in which the reflecting surface and the center of curvature fall on the same side of the mirror. A concave lens can form both virtual and real image because the parallel rays passing through the lens spread as they leave the lens. Due to this structure, it is able to converge the light rays. The crucial difference between concave and convex lens is that a concave lens diverges the light rays that incident on its surface. Difference between Convex and Concave Lens Difference between Convex and Concave Lens. A concave lens is just the opposite of a convex lens. Unlike, concave lens, whose thin centre causes the object to look farther and smaller. The lens which disperses the light rays around, that hits the lenses, are called a concave lens. Concave lens can be identified as the lens which disperses the light rays around, that hits the lenses. Lens has the capability of focusing and refracting light rays in a certain manner. Eye, camera, overhead projector, focus sunlight, projector microscope, simple telescope, glasses (to correct for long sight), magnifying glass, etc. They produce real images, and therefore are mainly used in various optical instruments. Also, we will learn about the types of lenses, and different types of images formed by these lenses. They are unable to form an image on a screen. We will discuss here the difference between concave and convex lenses. Convex means “curved or rounded like the outside of a sphere or circle”. They work on the principles of refraction, as they change the direction of light waves by refraction. But before that, let’s understand the main keywords related to these lenses. Lenses are transparent objects with a curved surface. (regardless of the object's position), Real , inverted, smaller than object, - object at F, Real , inverted, same size as object, - object at 2F, Real , inverted, larger than  object, object between 2F and F, Virtual, upright, larger than object – behind object on the same side of the lens. A convex lens is used to treat hyperopia or farsightedness. When the light rays pass through the convex lens, it converges the light rays and focuses on one point. On the contrary, the image formed by the concave lens is erect, virtual and smaller, than the object. It happens due the fact that rays focus on the object and the object looks bigger than its actual size. Therefore, the image created by a concave lens is always a virtual image rather than a real image. Concave lenses are curved outward. A convex lens is known as a converging lens, whereas a concave lens is also known as a diverging lens. When object place btwn Pole and Focus.. Key difference. Comparison between Convex and Concave Lenses: A concave lens is thinner in the middle and thicker at the edges. We will discuss here the difference between concave and convex lenses. Thinner at the center as compared to its edges. Unlike a prism, a lens can focus a ray of light to form an image, while prism simply refracts the light beam without focusing. Difference Between Physical Map and Political Map, Difference Between Authority and Responsibility, Difference Between Basic and Applied Research, Difference Between Micro and Macro Economics, Difference Between Developed Countries and Developing Countries, Difference Between Management and Administration, Difference Between Qualitative and Quantitative Research, Difference Between Percentage and Percentile, Difference Between Journalism and Mass Communication, Difference Between Internationalization and Globalization, Difference Between Sale and Hire Purchase, Difference Between Complaint and Grievance, Difference Between Free Trade and Fair Trade, Difference Between Partner and Designated Partner. Yes its right but in a case concave mirror also form virtual and errect image. Rays of light that pass through the lens are brought closer together (they converge). The disparity between concave and convex lenses will clearly be understood when contemplating the concave lens internally. Difference Between | Descriptive Analysis and Comparisons, Counterintelligence Investigation vs Criminal Investigation. Contents of the page. However, they seem to intersect on the incidence side by tracing the emerging rays backward. A convex lens enables a thing to look bigger than its actual size. This phenomenon is responsible for the creation of virtual images. Therefore, it diverges the light rays. 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. Image Courtesy: gcsescience.com, passmyexams.co.uk. There are two types of lenses which rare known as convex lens and Concave Lens. Concave Lens : With external surfaces curving inside, a concave lens is just the opposite, making parallel light rays curve outwardly or diverge. The focal point is the point where the light rays meet. The terms are used as adjectives to describe the types of lens, mirrors, polygons, etc. However, they are widely used together with convex lens in order to provide sharp images to the convex lens. 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. Used for the correction of problem in short sight. Your email address will not be published. A convex lens is thicker in the middle and thinner at the edges. Due to the thicker centre of convex lenses, the objects are seen larger and closer. Convex lenses are beneficial in treating presbyopia, or far-sightedness. Conversely, the concave lenses are thinner at the centre and thicker at its edges, in structure. In a far-sighted person, the light is focused behind the retina. Concave and convex are also two types of spherical mirrors. 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