<< < -cl con for lin lin lin neb qua str > >>
linear velocity tondâ-ye xatti Fr.: vitesse linéaire The rate of change of the position of an object that is traveling along a straight path. In other words, the velocity of an object when its moving direction is not changing. For a given → angular velocity (ω), the linear velocity v of the particle is directly proportional to the distance of the particle from the center of the circular path: v = ω ×r. |
linearity xattigi Fr.: linéarité The property, condition, or state of being linear. |
linearization xatteš, xattâneš Fr.: linéarisation A process of reduction to linear form by appropriate change of variables or by approximation. Verbal noun of → linearize. |
linearize xattidan, xattânidan Fr.: linéariser To make linear; give linear form to. |
linearized differential equation hamugeš-e degarsâneyi-ye xatti Fr.: équation différentielle linéarisée A differential equation that has been derived from an original nonlinear equation. Linearized, p.p. of → linearize; → differential; → equation. |
linearly xattâné Fr.: linéairement In a manner characterized by first-degree algebraic terms. Adverb of → linear. |
linearly dependent xattâné vâbasté Fr.: linéairement dépendant A set of objects x_{1}, x_{2}, ..., x_{n} (→ vectors, → matrices, → polynomials, etc.) on a given set if there is a linear combination of them: a_{1}x_{1} + a_{2}x_{2} + ... + a_{n}x_{n}, which is zero, but at least one of the coefficients is non-zero. For example the binomials (2x + y) and (6x + 3y) are linearly dependent, since 3(2x + y) - (6x + 3y) = 0. |
linearly independent xattâné nâvâbasté Fr.: linéairement indépendant 1) A set of objects x_{1}, x_{2}, ..., x_{n}
(→ vectors, → matrices,
→ polynomials, etc.) if it si not
→ linearly dependent. → linearly; → independent. |
linearly polarized light nur-e qotbide-ye xatti Fr.: lumière polarisée linéairement Light exhibiting → linear polarization. |
LINER lâyner (#) Fr.: LINER A type of galactic nucleus that is defined by its spectral line emission. The lines are very weak, the most prominent ones being from low ionization states (such as [O II], [N II], [S II] and [OI]). There is so far no generally accepted interpretation of the spectra of liners. It is likely that galaxies of different histories may have their nuclei with liner-type spectra. → retired galaxy. Short for → Low-Ionization Nuclear Emission-line Region. The term liner was first introduced by T. M. Heckman (1980, A&A 87, 152). |
linewidth xatt-pahnâ (#), pahnâ-ye xatt (#) Fr.: largeur de raie 1) The range of frequencies or wavelengths over which
radiations are absorbed or emitted in a transition between a specific
pair of atomic energy levels. The full width is determined between
half-power points of the line. |
lithium I line xatt-e litiom I Fr.: raie de lithium I A → resonance line of → lithium at 6707.81 Å doublet 6707.76 and 6707.91 Å. → lithium; I for → neutral atom; → line. |
low-ionization line xatt-e kamyoneš (#) Fr.: raie de faible ionisation A spectral line arising from a transition between atomic levels with an ionization potential below approximately 15 electron-volts. → low; → ionization; → line. |
low-ionization nuclear emission-line region nâhiye-ye hasteyi bâ xatt-e gosili-ye kamyoneš (#) Fr.: Noyau de galaxie à raies d'émission de faible ionisation Same as → LINER. → low; → ionization; → nuclear; → emission; → line; → region. |
Lyman alpha line xatt-e Lyman-âlfâ (#), tân-e ~ ~ Fr.: raie Lyman alpha The spectral line in the → Lyman series which is associated with the → atomic transition between → energy levels n = 2 and n = 1. The corresponding wavelength is 1216 Å in the → far ultraviolet. |
magnetic field line xatt-e meydân-e meqnâtisi (#) Fr.: ligne de champ magnétique An imaginary line used for representing the strength and direction of a magnetic field. Charged particles move freely along magnetic field lines, but are inhibited by the magnetic force from moving across field lines. |
masculine narin (#) Fr.: masculin 1) Having qualities appropriate to or usually associated with a man. M.E. masculin, from O.Fr. masculin "of the male sex," from L. masculinus "male, of masculine gender," from masculus "male, masculine; worthy of a man," diminutive of mas "male person, male," of unknown origin. Narin, from nar, → male. |
Na I D-line xatt-e D-ye Na I Fr.: raie D de Na I → D line. |
narrow-line region nâhiye-ye bârik-xatt Fr.: région à raies étroites The outer region of a → quasar or an → active galactic nucleus displaying narrow spectral lines. Also called Type II AGN. See also → obscuring torus. |
natural line broadening pahneš-e zâstâri-ye xatt Fr.: élargissement naturel de raie The broadening of any spectral line due to the fact that excited levels have mean lives, which, by virtue of the uncertainty principle, implies a spread in the energy values. → natural; → line; → broadening. |
<< < -cl con for lin lin lin neb qua str > >>