4 jan. 2017/ learning physics
In mathematics, curvature
is any of a number of loosely related concepts in different areas of geometry.
Intuitively, curvature is the amount by which a geometric object such as a surface deviates from being a flat plane, or a curve from being straight as in the case of a line, but this is defined in different ways depending on the context.
There is a key distinction between extrinsic curvature, which is defined for objects embedded in another space (usually a Euclidean space) – in a way that relates to the radius of curvature of circles that touch the object – and intrinsic curvature, which is defined in terms of the lengths of curves within a Riemannian manifold.
This article deals primarily with extrinsic curvature.
Its canonical example is that of a circle, which has a curvature equal to the reciprocal of its radius everywhere.
CURVATURE equals 1/ radius.
for plane or st. line
curvature is zero,
Smaller circles bend more sharply, and hence have higher curvature.
The curvature of a smooth curve is defined as the curvature of its osculating circle at each point.
Curvature is normally a scalar quantity, but one may also define a curvature vector that takes into account the direction of the bend in addition to its magnitude.
The curvature of more complex objects (such as surfaces or even curved n-dimensional spaces) is described by more complex objects from linear algebra, such as the general Riemann curvature tensor.
This article sketches the mathematical framework which describes the curvature of a curve embedded in a plane and the curvature of a surface in Euclidean space.
https://en.wikipedia.org/wiki/Curvature
In mathematics, curvature
is any of a number of loosely related concepts in different areas of geometry.
Intuitively, curvature is the amount by which a geometric object such as a surface deviates from being a flat plane, or a curve from being straight as in the case of a line, but this is defined in different ways depending on the context.
There is a key distinction between extrinsic curvature, which is defined for objects embedded in another space (usually a Euclidean space) – in a way that relates to the radius of curvature of circles that touch the object – and intrinsic curvature, which is defined in terms of the lengths of curves within a Riemannian manifold.
This article deals primarily with extrinsic curvature.
Its canonical example is that of a circle, which has a curvature equal to the reciprocal of its radius everywhere.
CURVATURE equals 1/ radius.
for plane or st. line
curvature is zero,
Smaller circles bend more sharply, and hence have higher curvature.
The curvature of a smooth curve is defined as the curvature of its osculating circle at each point.
Curvature is normally a scalar quantity, but one may also define a curvature vector that takes into account the direction of the bend in addition to its magnitude.
The curvature of more complex objects (such as surfaces or even curved n-dimensional spaces) is described by more complex objects from linear algebra, such as the general Riemann curvature tensor.
This article sketches the mathematical framework which describes the curvature of a curve embedded in a plane and the curvature of a surface in Euclidean space.
https://en.wikipedia.org/wiki/Curvature
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