Oxford Index Browse

You are looking at 1-10 of 32 items for:

Chemistry x Astronomy and Astrophysics x clear all

Refine by type

Refine by product

 

blueshift

Overview page. Subjects: Astronomy and Astrophysics — Chemistry.

A Doppler shift of light towards the blue end of the spectrum, caused when the emitting source is approaching the observer. See also Radial Velocity; Redshift.

See overview in Oxford Index

Boltzmann constant

Overview page. Subjects: Chemistry — Astronomy and Astrophysics.

Symbol k. The ratio of the universal gas constant (R) to the Avogadro constant (N A). It may be thought of therefore as the gas constant per molecule:k = R/N A =...

See overview in Oxford Index

Cerenkov counter

Overview page. Subjects: Chemistry — Astronomy and Astrophysics.

A device for detecting high-energy charged particles via the Cerenkov radiation they generate. This radiation, which appears as a predominantly bluish light, can be detected using...

See overview in Oxford Index

Cerenkov radiation

Overview page. Subjects: Chemistry — Astronomy and Astrophysics.

The light emitted by charged particles such as protons or electrons when they pass through a transparent medium (e.g. the Earth's atmosphere, glass, or certain plastics) at a speed greater...

See overview in Oxford Index

correlation function

Overview page. Subjects: Astronomy and Astrophysics — Chemistry.

A mathematical function used in the statistical description of galaxy clustering. It measures the excess probability of finding a galaxy at a given distance from a particular galaxy,...

See overview in Oxford Index

degeneracy

Overview page. Subjects: Astronomy and Astrophysics — Chemistry.

A state of matter attained when atomic particles are packed together as tightly as is physically possible, at densities of several thousand tonnes per cubic metre. Particles which are very...

See overview in Oxford Index

docking

Overview page. Subjects: Chemistry — Astronomy and Astrophysics.

The binding of any macromolecule or part of such a molecule to its specific harbouring site on another molecular structure. See also signal recognition particle receptor.

See overview in Oxford Index

doublet

Overview page. Subjects: Astronomy and Astrophysics — Chemistry.

A pair of associated lines in certain spectra, e.g. the two lines that make up the sodium D-lines.

See overview in Oxford Index

electron density

Overview page. Subjects: Chemistry — Astronomy and Astrophysics.

The number of free electrons per unit volume of space. Typical values range from less than 10−4 electrons/cm3 in intergalactic space to 0.03 electrons/cm3 in the disk of our Galaxy, 104 ele...

See overview in Oxford Index

Faraday effect

Overview page. Subjects: Astronomy and Astrophysics — Chemistry.

The rotation of the plane of polarization of an electromagnetic wave as it passes through a region containing free electrons and a magnetic field; also known as Faraday rotation. The amount...

See overview in Oxford Index