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Spherical symmetry is a characteristic feature of many solutions of Einstein's field equations of general relativity, especially the Schwarzschild solution.
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Spherical and symmetry
Spherical triangle groups can be identified with the symmetry groups of regular polyhedra in the three-dimensional Euclidean space: Δ ( 2, 3, 3 ) corresponds to the tetrahedron, Δ ( 2, 3, 4 ) to both the cube and the octahedron ( which have the same symmetry group ), Δ ( 2, 3, 5 ) to both the dodecahedron and the icosahedron.
Spherical and is
Spherical geometry is similar to elliptical geometry.
* Spherical segment, is a portion of a sphere cut off by a pair of parallel planes
Spherical geometry is the geometry of the two-dimensional surface of a sphere.
Spherical geometry is not elliptic geometry but shares with that geometry the property that a line has no parallels through a given point.
Spherical aberration is an optical effect observed in an optical device ( lens, mirror, etc.
The complete list of such manifolds is given in the article on Spherical 3-manifolds.
The first Seidel aberration, Spherical Aberration, is independent of the position of the exit pupil ( as it is the same for axial and extra-axial pencils ).
Spherical mirror distortion is used in projection systems that utilize a digital video projector and a first surface convex spherical mirror to project images onto a dome.
Spherical equivalent refraction is normally used to determine soft lens power and spherical glasses power.
Spherical trigonometry is a branch of spherical geometry which deals with polygons ( especially triangles ) on the sphere and the relationships between the sides and the angles.
Struycken is also an avid photographer with a website devoted to his Spherical Panoramas.
* Spherical errors occur when the optical power of the eye is either too large or too small to focus light on the retina.
Spherical mirrors may be used for direction finding by moving the sensor rather than the mirror ; another unusual example is the Arecibo Observatory ; see also
Still Life with Spherical Mirror is a lithography print by the Dutch artist M. C. Escher which was first printed in November, 1934.
Hand with Reflecting Sphere also known as Self-Portrait in Spherical Mirror is a lithograph print by Dutch artist M. C. Escher, first printed in January 1935.
Spherical tokamaks are not limited by the same instabilities as tokamaks and as such the area is receiving considerable experimental attention.
:; Spherical generation: The proper expression for making or turning a shape is to generate as in to generate a form around a fixed axis of revolution.
The Mega Ampere Spherical Tokamak, or MAST experiment is a nuclear fusion experiment in operation at Culham, Oxfordshire, United Kingdom since December 1999.
Spherical astronomy is the branch of astronomy that is concerned with where celestial objects are located and how they move on the celestial sphere.
Spherical astronomy or positional astronomy is the branch of astronomy that is used to determine the location of objects on the celestial sphere, as seen at a particular date, time, and location on the Earth.
An absolute location is designated using a specific pairing of latitude and longitude, a Cartesian coordinate grid ( e. g., a Spherical coordinate system ), an ellipsoid-based system ( e. g., World Geodetic System ), or similar methods.
Spherical and many
Spherical harmonics are important in many theoretical and practical applications, particularly in the computation of atomic orbital electron configurations, representation of gravitational fields, geoids, and the magnetic fields of planetary bodies and stars, and characterization of the cosmic microwave background radiation.
Spherical and solutions
which regular solutions for positive energies are given by so-called Bessel functions of the first kind ' so that the solutions written for R are the so-called Spherical Bessel function
Spherical and general
Spherical stone shot were chosen because of cheapness ; forged iron, bronze and lead balls were tried, but the expense prevented their general adoption.
Spherical and relativity
Spherical coordinates are one of the most used curvilinear coordinate systems in such fields as Earth sciences, cartography, and physics ( in particular quantum mechanics, relativity ), engineering, etc.
Spherical and .
Spherical concave backing surfaces support the diaphragm when excessive pressures are applied and prevent the stresses within the diaphragm from exceeding the elastic limit.
* Simon Newcomb, A Compendium of Spherical Astronomy ( Macmillan, 1906 – republished by Dover, 1960 ), 160-172.
Spherical errors occur when errors have both uniform variance ( homoscedasticity ) and are uncorrelated with each other.
Spherical fullerenes are also called buckyballs, and they resemble the balls used in soccer.
* Thin Spherical Lenses on Project PHYSNET.
* Spherical concave and convex mirrors do not focus parallel rays to a single point due to spherical aberration.
** M. C. Escher used special shapes of mirrors in order to achieve a much more complete view of his surroundings than by direct observation in Hand with Reflecting Sphere ( also known as Self-Portrait in Spherical Mirror ).
Spherical mechanisms are constructed by connecting links with hinged joints such that the axes of each hinge passes through the same point.
Select this link for an animation of a Spherical deployable mechanism.
Spherical coordinates ( r, θ, φ ) as often used in mathematics: radial distance r, azimuthal angle θ, and polar angle φ.
Spherical waves coming from a point source.
Spherical objects with this surface area have a radius or diameter in the range 89, 000 km to 564, 000 km.
Spherical coordinates, projected on the celestial sphere, are analogous to the geographic coordinate system used on the surface of the Earth.
* Planned completion of the Five hundred meter Aperture Spherical Telescope, in China.
Spherical waves are waves whose amplitude depends only upon the radial distance r from a central point source.
* Spherical sector, portion of a sphere enclosed by a cone of radii from the center of the sphere.
* SDEC Spherical Discrete Element Code.
* Chute Maven ( Hustrulid Technologies Inc .) Spherical Discrete Element Modeling in 3 Dimensions.
Spherical particles undergo less particle rearrangement than irregular particles.
* Spherical coordinate system represents a point in three space by the distance from the origin and two angles measured from two reference lines which intersect the origin.
* Robin Michael Green, Spherical Astronomy.
: See also Spherical law of cosines and Half-side formula.
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