nodal plane
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Nodal precession — is the precession of an orbital plane around the rotation axis of an astronomical body such as the Earth. This precession is due to the non spherical nature of a spinning body which creates a non spherical gravitational field. Around a spherical… … Wikipedia
plane — 1. A two dimensional flat surface. See planum. 2. An imaginary surface formed by extension of a point through any axis or two definite points, in reference especially to craniometry and to pelvimetry. SYN: planum. [L. planus, flat] Addison … Medical dictionary
Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry … Wikipedia
chemical bonding — ▪ chemistry Introduction any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another … Universalium
Focal mechanism — The focal mechanism of an earthquake describes the inelastic deformation in the source region that generates the seismic waves. In the case of a fault related event it refers to the orientation of the fault plane that slipped and the slip vector… … Wikipedia
Delta bond — Formation of a delta bond by the overlap of two d orbitals … Wikipedia
Scintillation (physics) — Scintillation is a flash of light produced in a transparent material by an ionization event. See scintillator and scintillation counter for practical applications.OverviewThe process of scintillation is one of luminescence whereby light of a… … Wikipedia
Molecular orbital — See also: Molecular orbital theory In chemistry, a molecular orbital (or MO) is a mathematical function describing the wave like behavior of an electron in a molecule. This function can be used to calculate chemical and physical properties such… … Wikipedia
Sigma bond — In chemistry, sigma bonds (σ bonds) are the strongest type of covalent chemical bond. Sigma bonding is most clearly defined for diatomic molecules using the language and tools of symmetry groups. In this formal approach, a σ bond is symmetrical… … Wikipedia
Queen Charlotte Fault — The Queen Charlotte Fault is an active transform fault, located between the North American Plate and the Pacific Plate, Canada s equivalent of the San Andreas Fault. The Queen Charlotte Fault forms a triple junction on its south with the Cascadia … Wikipedia
Molecular orbital diagram — A molecular orbital diagram, or MO diagram for short, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the Linear combination of atomic orbitals molecular orbital… … Wikipedia
