Fr.: ère de recombinaison
The era some 380,000 years after the → Big Bang (at a → redshift of about 1,100), when the Universe had cooled sufficiently so that protons and electrons combined to form → neutral hydrogen in a process called → recombination. The temperature was about 3,000 K and the ionization fraction low enough for Universe to become transparent to light. Consequently matter and radiation decouple from one another because no further → scattering of the radiation occurs. The observation of the → cosmic microwave background radiation provides a means of studying the Universe at the recombination era. Also called recombination epoch and → decoupling era.
Fr.: raie de recombinaison
An → emission line in a spectrum produced in an → H II region when a free electron combines with an ionized atom to form a neutral atom or an ion of lower → ionization stage. Same as → free-bound emission.
Fr.: rayonnement de recombinaison
Radiation produced when a free electron in a plasma is captured by an ionized atom.
Fr.: taux de recombinaison
Fr.: temps de recombinaison
Fr.: recombiner, se recombiner
To combine or put together again. To undergo or cause recombination.
1) vâgat; 2) vâgatidan
Fr.: 1) enregistrement; 2) enregistrer
1a) An act of recording.
From M.E. recorden "to repeat, to report," from O.Fr. recorder "to get by heart," from L. recordari "to call to mind, remember," from → re- "back, again" + cor "heart" (as the metaphoric seat of memory, as in learn by heart).
Vâgat literally "to take, seize, to take back," cf. Ger. aufnehmen "to record," from nehmen "to take;" E. "take down" "to note down;" Šahmirzâdi vagatan "to take," Lâhijâni vitan "to take, seize," Aftari veytu "to take," Delijâni bitan "to take," var of Tâleši gate, Târi gata/ger, Sorxeyi gil, variants of gereftan, → concept.
Râstgušé, from râst, → right, + gušé "corner, angle;" Mid.Pers. gôšak "corner."
Having the base or section in the form of a rectangle. Shaped like a rectangle.
Adj. of → rectangle.
Fr.: fenêtre rectangulaire
A → window function that is constant inside a specified interval.
1) Math.: The process of determining the length of a curve.
Verbal noun of → rectify.
Fr.: spectre rectifié
A spectrum after correction for detector's → baseline.
Agent noun of → rectify.
1) General: To make, put, or set right; to correct.
M.E. rectifien, from O.Fr. rectifier "to make straight," from L.L. rectificare "make right," from L. rectus "straight," cognate with Pers. râst, as below, → right + root of facere "to make, do, perform" (cf. Fr. faire, Sp. hacer), from PIE base *dhe- "to put, to do" (cf. Mod.Pers. dâdan "to give;" O.Pers./Av. dā- "to give, grant, yield," dadāiti "he gives; puts;" Skt. dadáti "puts, places;" Hitt. dai- "to place;" Gk. tithenai "to put, set, place;" Lith. deti "to put;" Czech diti, Pol. dziac', Rus. det' "to hide," delat' "to do;" O.H.G. tuon, Ger. tun, O.E. don "to do").
Râstidan, literally "to make straight, right," infinitive from râst cognate with L. rectus "straight," → right.
In a straight line; consisting of straight lines. → curvilinear
rectilinear propagation of light
tuceš-e râst-xatt-e nur
Fr.: propagation rectiligne de la lumière
The motion of light in the first approximation, as evidenced from the formation of shadows and other every day experience. However, → diffraction
Fr.: système rectilinéaire
Fr.: se reproduire périodiquement, revenir
To occur again, as an event, experience, etc.
Bâzâmadan "to come back, return," from bâz, → re-, + âmadan "to come, arrive, become" (present stem ây-); Av. ay- "to go, to come," aēiti "goes;" O.Pers. aitiy "goes;" Skt. e- "to come near," eti "arrival;" L. ire "to go;" Goth. iddja "went;" Lith. eiti "to go;" Rus. idti "to go."
1) An act or instance of recurring.
Verbal noun of → recur.
Fr.: relation de recurrence
A → sequence based on a → rule that gives the next → term as a → function of the previous term(s). For example, the sequence 3, 9, 21, 45,... can be represented by the recurrence relation un+1 = 2un + 3, where u1 = 3 and n ≥ 1.