define concave and convex
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concave concave. rounded and somewhat depressed or hollowed out. concave face. of the Golgi complex in the developing embryo is associated with maturing secretory vesicles. concave shoe. a horseshoe with its inner edge thicker than the outer so that the surface touching the ground is slightly smaller than the surface in contact with the hoof.
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convex convex. adj. 1. curving or bulging outwards. 2. (General Physics) physics having one or two surfaces curved or ground in the shape of a section of the exterior of a sphere, paraboloid, ellipsoid, etc: a convex lens. 3. (Mathematics) maths (of a polygon) containing no interior angle greater than 180°.
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Lenses A convex lens is also called a converging lens because it makes parallel light rays passing through it bend inward and meet (converge) at a spot just beyond the lens known as the focal point. Photo: A convex lens makes light rays converge (come together) at the focal point or focus. The distance from the center of the lens to the focal point is the focal length of the lens. Convex lenses are used in things like telescopes and binoculars to bring distant light rays to a focus in your eyes.
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Concave Wheels What is a Concave Wheel? Concave Technology takes the center of the wheel and dips inwards to give it that bowl effect. Rather than exaggerating a bigger lip for the back wheel, and a smaller lip for the front. Concave wheels emphasize the concavity of the rear wheel to differentiate from the front wheel.
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- (Definition of “concave” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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Polyhedron A polyhedron is said to be convex if its surface (comprising its faces, edges and vertices) does not intersect itself and the line segment joining any two points of the polyhedron is contained in the interior or surface. A polyhedron is a 3-dimensional example of the more general polytope in any number of dimensions.
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Mentos (candy) If you want mean I ate some mentos and soda and nothing happened, what's wrong Then I can tell you nothing is wrong. The recation happens because you are dropping the mentos into the soda (see http://wiki.answers.com/Q/Why_do_diet_coke_and_mentos_react for full details) and the digestion doesn't...
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Definitions &Translations Conic definition, Also, conical. having the form of, resembling, or pertaining to a cone. See more.
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Lens (optics) The distance from this point to the lens is also known as the focal length, though it is negative with respect to the focal length of a converging lens. Convex-concave (meniscus) lenses can be either positive or negative, depending on the relative curvatures of the two surfaces. A negative meniscus lens has a steeper concave surface and is thinner at the centre than at the periphery.
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- Convex mirror: Always form virtual and erect image but the size of image is always smaller than size of object. Concave mirror: when the object is anywhere from infinity to focus the image so form will be real and inverted.
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What Is a Seven-Sided Shape Called? There are five types of polygons: 1  Concave: has at least one angle that measures more than 180 degrees; a straight line drawn through the shape intersects more than two segments.  Convex: all angles measure less than 180 degrees; a straight line drawn through the shape intersects no more than two sides.
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- Definition of Convex Lens. A lens which is thinner at the edges and thicker at the centre is known as convex lens. Generally lenses are made up of glass or transparent plastic and the same can be used for transmitting, refracting or for focusing the light.
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- Even if there are places on a concave shape that you can draw a line through and have it only pass through two of the lines or polygons, if it can be draw anywhere on the shape so that it passes through more than two lines, then the shape is considered concave.
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contour contour. 1  the general shape or form of a figure, configuration, etc.: the rounded contours of the foothills. 2  the outline of such a shape.
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- In mathematics, concave function and convex function play an important role. Both the functions are related to each other. A concave function is the negative of a convex function. A function $f(x)$ is concave over a convex set if the function: $f(x)$ is a convex function over the set. Then, the result obtained for convex functions can be modified into result for concave functions by multiplication by -1 and vice versa.
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Concave function A function is called strictly concave if. for any α in (0,1) and x ≠ y. For a function f:R→R, this definition merely states that for every z between x and y, the point (z, f(z) ) on the graph of f is above the straight line joining the points (x, f(x) ) and (y, f(y) ).
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Describe the image formed by a concave lens? The concave lens is the one on the right. The image is: virtual erect (the same way up as the object) diminished (smaller than the object) nearer to the lens than the object and located at a distance from the lens less than the focal length.. It's virtual, upright and reduced.
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- More About Convex Lens. 1  A convex lens is supposed to be made up of number of prisms with the base of each prism towards the centre of the lens. 2  When rays parallel to the principal axis pass through a convex lens, they are bent inwards.  The point at which they converge is known as principle focus.
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Convex function In mathematics, a real-valued function defined on an interval is called convex (or convex downward or concave upward) if the line segment between any two points on the graph of the function lies above or on the graph, in a Euclidean space (or more generally a vector space) of at least two dimensions.
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Convex set A set that is not convex is called a non-convex set. A polygon that is not a convex polygon is sometimes called a concave polygon, and some sources more generally use the term concave set to mean a non-convex set, but most authorities prohibit this usage.
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Convex Convex, meaning curving out or extending outward (compare concave), may refer to: Convex set in mathematics Convex function in mathematics convex polygon a polygon in which no line segment between two points on the boundary ever goes outside the polygon.
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What Does a Scientist Do? You won't believe these 10 facts about people. A scientist is a person who explores and examines aspects of the physical world to better understand how they function. It is a generic term encompassing a wide range of fields. All scientists have some type of specialization, such as the human body or the oceans, which provides them with a more formal and specific title.
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Hexagon When all angles are equal and all sides are equal it is regular, otherwise it is irregular: A convex hexagon has no angles pointing inwards. More precisely, no internal angles can be more than 180°. When any internal angle is greater than 180° it is concave. (Think: concave has a cave in it)
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Concave Lens: Definition & Uses There are two main types of lenses: convex and concave. Convex lenses often get all the credit. They are the type of lens responsible for magnification and are the most common lens used in photography and other common applications. Concave lenses, though, serve an important role as well. A concave lens is any lens that has an inward curve in the middle.
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Period Blood Colors and Textures: What Do They Mean? 274 Brown or Black period blood: Black or brown period blood colors are the oldest blood; most women notice these colors at the tail end of their period or during light spotting at the beginning. It usually isn’t that heavy.eep in mind, that in most cases, changes in period blood colors or texture are entirely irrelevant and don’t suggest any health problem. However, prolonged changes such as frequent heavy periods, odors, irregular periods, short periods, and/or severe pain during menstruation should be evaluated.
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- Then, the composite function g o f is a [strictly] concave function. • Let f and g be both concave functions on a convex subset of R n, and bounded from below. Then, the pointwise infinimum fucntion, Min { f (x), g (x)} is a concave function. Theorem: Let f be a concave function defined on a convex subset of R n.hen, the composite function g o f is a [strictly] concave function. • Let f and g be both concave functions on a convex subset of R n, and bounded from below. Then, the pointwise infinimum fucntion, Min { f (x), g (x)} is a concave function. Theorem: Let f be a concave function defined on a convex subset of R n.
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Lens (optics) Types of simple lenses. Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex (or double convex, or just convex) if both surfaces are convex. If both surfaces have the same radius of curvature, the lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave).