Spherical errors occur when errors have both uniform variance ( homoscedasticity ) and are uncorrelated with each other.

Spherical concave backing surfaces support the diaphragm when excessive pressures are applied and prevent the stresses within the diaphragm from exceeding the elastic limit.

** Spherical aberration, which occurs when light rays strike a lens or mirror near its edge

Spherical aberration occurs due to the increased refraction of light rays that occurs when rays strike a lens, or a reflection of light rays that occurs when rays strike a mirror near its edge in comparison with those that strike nearer the center.

Spherical aberration is an optical effect observed in an optical device ( lens, mirror, etc.

Spherical equivalent refraction is normally used to determine soft lens power and spherical glasses power.

Spherical lenses have a single power in all meridians of the lens, such as + 1. 00 D, or − 2. 50 D.

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.

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 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 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.

Spherical symmetry is a characteristic feature of many solutions of Einstein's field equations of general relativity, especially the Schwarzschild solution.

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 concave and convex mirrors do not focus parallel rays to a single point due to spherical aberration.

Spherical aberration of collimated light incident on a concave spherical mirror.

Spherical mirrors are easier to make than parabolic mirrors and they are often used to produce approximately collimated light.

* Thin Spherical Lenses on Project PHYSNET.

Spherical coordinates, projected on the celestial sphere, are analogous to the geographic coordinate system used on the surface of the Earth.

Spherical trigonometry was studied by early Greek mathematicians such as Menelaus of Alexandria, who wrote a book on spherical trigonometry called Sphaerica and developed Menelaus ' theorem.

* Cradle – Spherical bowl turned on its side, typically connected with a bowl.

Spherical codes are higher-dimensional analogues of Tammes problem, which arose as an attempt to explain the distribution of pores on pollen grains.

He was the Principal Investigator ( PI ) on the Spacelab 3 mission NASA Drop Dynamics ( DDM ) experiments, PI on the NASA SPAR Flight Experiment # 77-18 " Dynamics of Liquid Bubble ," PI on the NASA SPAR Flight Experiment # 76-20 " Containerless Processing Technology ," and PI on the Department of Energy Experiment " Spherical Shell Technology.

* An Elementary Treatise on Plane and Spherical Trigonometry, Boston: James Munroe and Company.

* Quadrilateralized Spherical Cube, a mapping scheme for data collected on a spherical surface, such as a planet

* A Treatise on Spherical Catoptrics, published in the Phil.

Spherical triangles were studied by early Greek mathematicians such as Menelaus of Alexandria, who wrote a book on spherical triangles called Sphaerica and developed Menelaus ' theorem.

However, he also published books on mathematical astronomy such as A Treatise on Spherical Astronomy.

* William M. Smart, edited by Robin M. Green, Textbook on Spherical Astronomy, 1977, Cambridge University Press, ISBN 0-521-29180-1.

Spherical groups with a radially fibrous structure and bristled with crystals on the surface are not uncommon.