farâvâni-ye bonpâr, ~ onsor
Fr.: abondance élémentaire, ~ d'un élément
Emission nebulae: The relative amount of a given → chemical element in an ionized nebula with respect to another element, usually → hydrogen. Elemental abundance ratios of → emission nebulae are obtained either by adding the observed → ionic abundances of the element or by using → ionization correction factors. Same as → total abundance.
Elemental, from M.L. elementalis, → element + -al; abundance, from O.Fr. abundance, from L. abundantia "fullness," from abundare "to overflow," from L. ab- "away" + undare "to surge," from unda "water, wave;" → abundance.
1) Being an original or primary source.
L.L. fundamentalis "of the foundation," from L. fundamentum "foundation," from fundare "to found."
Bonyâdin, adj. of bonyâd "foundation, basis," from *bondâd (Mid.Pers. bune dâtak "foundation, basis"), from bon "basis; root; foundation; bottom" (Mid.Pers. bun "root; foundation; beginning," Av. būna- "base, depth," cf. Skt. bundha-, budhná- "base, bottom," Pali bunda- "root of tree") + dâd "given," from dâdan "to give" (Mid.Pers. dâdan "to give," O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives;" Skt. dadáti "he gives," Gk. didomi "I give," tithenai "to put, set, place;" L. dare "to give, offer;" Rus. delat "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do").
pâyâ-ye bonyâdin (#)
Fr.: constante fondamentale
A physical constant that cannot be expressed in terms of other constants of nature, such as the charge of the electron.
niru-ye bonyâdin (#)
Fr.: force fondamentale
Same as the → fundamental interaction.
basâmad-e bonyâdin (#)
Fr.: fréquence fondamentale
The lowest frequency in a complex wave.
Fr.: interaction fondamentale
Any of the four interactions in nature between bodies of matter and that are mediated by one or more particles. Also called the → fundamental force. In order of decreasing strength, the four fundamental interactions are the → strong interaction, the → electromagnetic interaction, the → weak interaction, and the → gravitational interaction.
zarre-ye bonyâdin (#)
Fr.: particule élémentaire
Same as → elementary particle.
Fr.: étoile fondamentale
A relatively bright star for which coordinates and proper motion have been determined to a very high degree of accuracy.
Of, relating to, or performed by or with one or more instruments.
Adj. of → instrument.
Fr.: élargissement instrumental
The broadening of a point source caused by the response functions of the telescope and the instrument used.
Fr.: flexion d'instrument
An image defect caused by the mechanical flexure of materials; for example the curved-shape image of a long slit in a spectrograph.
Fr.: magnitude instrumentale
The magnitude derived directly using → Pogson's relation. The instrumental magnitude depends on → detector→ sensitivity, telescope → aperture, exact filter → bandpass, etc. It must be → calibrated to some standard → photometric system.
Fr.: profil instrumental
The shape of instrument's response to the input signal. The Fourier transform of the source function by the instrument function.
instrumental response function
karyâ-ye pâsox-e sâzâl
Fr.: fonction de la réponse instrumentale
The mathematical form of the way an instrument affects the input signal.
In the philosophy of science, the pragmatic view that a scientific theory is no more than a useful instrument or tool for getting our experiences in some order.
An astronomer, engineer, or technician who is concerned with the construction of astronomical instruments.
Of or pertaining to the → mind.
M.E., from M.Fr. mental, from L. mentalis "of the mind," from mens (genitive mentis) "mind," from PIE root *men- "to think."
1) Mental capacity or endowment.