An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 13116 Search : far
relative invariant
  ناورتای ِ بازانی   
nâvartâ-ye bâzâni

Fr.: invariant relatif   

A → relative tensor of order zero.

relative; → invariant.

relative permeability
  تراوایی ِ بازانی   
tarâvâyi-ye bâzâni

Fr.: perméabilité relative   

magnetic permeability.

relative; → permeability.

relative refractive index
  دیشن ِ شکستی ِ بازانی   
dišan-e šekasti-ye bâzâni

Fr.: indice de réfraction relatif   

The ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other.

relative; → refractive; → index.

relative sunspot number
  شمار ِ بازانی ِ هورلک   
šomâr-e bâzâni-ye hurlak

Fr.: nombre relatif de taches solaires   

Same as → Wolf number and → sunspot number.

relative; → sunspot; → number.

relative tensor
  تانسور ِ بازانی   
tânsor-e bâzâni

Fr.: tenseur relatif   

A generalized tensor concept that is characterized by a → Jacobian matrix of transformation raised to a power called → weight of a tensor density. In practice, only relative tensors of weight 1 or -1 are used. The product of a relative tensor of weight -1 by another tensor of weight 1 is an → absolute tensor. Same as → tensor density.

relative; → tensor.

relative vector
  بردار ِ بازانی   
bordâr-e bâzâni

Fr.: vecteur relatif   

A → relative tensor of → order  → one.

relative; → vector.

relative velocity
  تندای ِ بازانی   
tondâ-ye bâzâni

Fr.: vitesse relative   

For two objects A and B, the velocity which B, supposing itself at rest, assigns to A.

relative; → velocity.

relatively
  بازانی‌وار، بازانانه   
bâzânivâr, bâzânâné

Fr.: relativement   

In a relative manner; in relation to something else.

From → relative + -ly "-vâr, -âné."

relativism
  بازانی‌باوری   
bâzâni-bâvari

Fr.: relativisme   

The belief that truth is relative and may vary from individual to individual, from group to group, or from time to time, having no objective standard.

From → relative + -ism a suffix used in the formation of nouns denoting action or practice, state or condition, principles, doctrines, etc.

Bâzâni-bâvari, from bâzâni, → relative, + bâvari, from bâvar "belief" (Mid.Pers. wâbar "beleif;" Proto-Iranian *uar- "to choose; to convince; to believe;" cf. Av. var- "to choose; to convince" varəna-, varana- "conviction, faith;" O.Pers. v(a)r- "to choose; to convince;" Skt. vr- "to choose," vara- "choosing").

relativist
  بازانی‌باور   
bâzâni-bâvar

Fr.: relativiste   

An adherent or advocate of relativism.

From → relative + -ist a suffix of nouns.

Adj. from → relativism.

relativistic
  بازانیگی‌مند، بازانیگی‌ور   
bâzânigimand, bâzânivar

Fr.: relativiste   

1) Physics: Relating to the → relativity theory.
2) Philosophy: Involving or characterized by → relativism.
See also:
non-relativistic, → relativistic aberration, → relativistic Doppler effect, → relativistic effect, → relativistic mass, → relativistic particle, → relativistic precession, → relativistic quantum mechanics, → relativistic redshift, → relativistic speed, → relativistic spin precession, → relativistic velocity, → ultrarelativistic, → ultrarelativistic gas.

From → relativist + → -ic.

relativistic aberration
  بیراهش ِ بازانیگی‌مند   
birâheš-e bâzânigimand

Fr.: aberration relativiste   

The aberration of light for an object moving with → relativistic speed. In contrast to the classical case, the → Lorentz transformation between the → rest frame of the observer and that of the object must be used. Relativistic aberration is expressed by the equation: cos φ' = (cos φ - )/(1 - cos φ.v/c), where φ is the classical → aberration angle, v the speed of the Earth, and c the → speed of light. It can also be expressed as: tan φ' = -(c/v)(1 - v2/c)1/2.

relativistic; → aberration.

relativistic Doppler effect
  اُسکر ِ دوپلر ِ بازانیگی‌مند   
oskar-e Doppler-e bâzânigimand

Fr.: effet Doppler relativiste   

The Doppler effect when the relative motion of the source and the observer is comparable to the speed of light. In that case the classical Doppler formula should be corrected for effects of the special theory of relativity (Lorentz transformation).

relativistic; → Doppler effect.

relativistic effect
  اسکر ِ بازانیگی‌مند   
oskar-e bâzânigimand

Fr.: effet relativiste   

A physical phenomenon described only by the theories of → special relativity or → general relativity.

relativistic; → effect.

relativistic mass
  جرم ِ بازانیگی‌مند   
jerm-e bâzânigimand

Fr.: masse relativiste   

In → special relativity, the mass that is assigned to a body in motion. Einstein demonstrated that the velocity of the observer has an effect on the way inertial mass is measured. The relativistic mass is expressed by mt = m0 / [1 - (v/c)2]1/2, where m0 is the → rest mass, v is the velocity, and c the → velocity of light. The experimental evidence for this phenomenon is observed in the mass of high-speed electrons accelerated by magnetic fields. This formula shows that it is impossible for a mass to be accelerated to the velocity of light in a vacuum.

relativistic; → mass.

relativistic particle
  ذرّه‌ی ِ بازانیگی‌مند   
zarre-ye bâzânigimand

Fr.: particule relativiste   

A particle which has a speed comparable to the velocity of light.

relativistic; → particle.

relativistic precession
  پیشایان ِ بازانیگی‌مند   
pišâyân-e bâzânigimand

Fr.: précession relativiste   

A → general relativistic phenomenon in which the line joining the → apsides of an orbit gradually rotates in a → prograde direction. Also called the → orbital precession and → perihelion precession. Although the general relativistic precession of Mercury's orbit is extremely small, the similar precession observed in the orbit of the → binary pulsar PSR B1913+16 amounts to 4.23 degrees per year, i.e. 36,000 times greater than the → advance of perihelion of Mercury.

relativistic; → precession.

relativistic quantum mechanics
  کو‌آنتوم مکانیک ِ بازانیگی‌مند   
kuântom mekânik-e bâzânigimand

Fr.: mécanique quantique relativiste   

A quantum theory that incorporates special relativity, for example, → quantum electrodynamics.

relativistic; → quantum mechanics.

relativistic redshift
  سرخ‌کیب ِ بازانیگی‌مند   
sorx kib-e bâzânigimand

Fr.: décalage vers le rouge relativiste   

A redshift caused by the → relativistic Doppler effect. → gravitational redshift.

relativistic; → redshift.

relativistic speed
  تندی ِ بازانیگی‌مند   
tondi-ye bâzânigimand

Fr.: vitesse relativiste   

Same as → relativistic velocity.

relativistic; → speed.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc coh col col col Com com com com com com com com Com con con con con con con con con con con con con coo Cor Cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>