TERMIUM Plus®
From: Translation Bureau
On social media
Consult the Government of Canada’s terminology data bank.
INCIDENT PHOTON [7 records]
Record 1 - internal organization data 2024-01-27
Record 1, English
Record 1, Subject field(s)
- Lasers and Masers
- Optics
Record 1, Main entry term, English
- incident photon
1, record 1, English, incident%20photon
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, French
Record 1, Domaine(s)
- Masers et lasers
- Optique
Record 1, Main entry term, French
- photon incident
1, record 1, French, photon%20incident
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2024-01-27
Record 2, English
Record 2, Subject field(s)
- Optical Instruments
- Physics of Solids
- Atomic Physics
Record 2, Main entry term, English
- nonlinear optical crystal
1, record 2, English, nonlinear%20optical%20crystal
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- non-linear optical crystal 2, record 2, English, non%2Dlinear%20optical%20crystal
correct
- nonlinear crystal 3, record 2, English, nonlinear%20crystal
correct
- non-linear crystal 4, record 2, English, non%2Dlinear%20crystal
correct
- NLO crystal 5, record 2, English, NLO%20crystal
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
The photon of an incident laser pulse(pump) is, by a nonlinear optical crystal, divided into two lower-energy photons. 6, record 2, English, - nonlinear%20optical%20crystal
Record 2, French
Record 2, Domaine(s)
- Instruments d'optique
- Physique des solides
- Physique atomique
Record 2, Main entry term, French
- cristal optique non linéaire
1, record 2, French, cristal%20optique%20non%20lin%C3%A9aire
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- cristal optique non-linéaire 2, record 2, French, cristal%20optique%20non%2Dlin%C3%A9aire
correct, masculine noun
- cristal non linéaire 3, record 2, French, cristal%20non%20lin%C3%A9aire
correct, masculine noun
- cristal non-linéaire 1, record 2, French, cristal%20non%2Dlin%C3%A9aire
correct, masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Une source laser émet une impulsion sur un cristal non linéaire, ce qui crée des paires de photons. 4, record 2, French, - cristal%20optique%20non%20lin%C3%A9aire
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2017-05-09
Record 3, English
Record 3, Subject field(s)
- Metrology and Units of Measure
- Scientific Information
- Optics
- Electromagnetic Radiation
Record 3, Main entry term, English
- photosynthetic photon flux density
1, record 3, English, photosynthetic%20photon%20flux%20density
correct
Record 3, Abbreviations, English
- PPFD 1, record 3, English, PPFD
correct
Record 3, Synonyms, English
- photosynthetically photon flux density 2, record 3, English, photosynthetically%20photon%20flux%20density
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The number of photons (400-700 nm) incident per unit time on a unit surface [suggested units: nE/cm² s (e=Einsteins)]. 2, record 3, English, - photosynthetic%20photon%20flux%20density
Record number: 3, Textual support number: 1 CONT
Plants use the 400 to 700 nm waveband of the light spectrum for photosynthesis. A simple integral relationship exists between the number of molecules changed photochemically and the number of photons absorbed within the requisite waveband regardless of photon energy. The preferred measurement for PAR is Photosynthetic Photon Flux Density(PPFD). This is the number of photons in the 400 to 700 nm waveband incident per unit time on a unit surface. Plant scientists, meteorologists, horticulturists, ecological survey groups and other environmental scientists are using this [Quantum PAR] sensor to measure PPFD in the atmosphere, growth chamber and greenhouse. 3, record 3, English, - photosynthetic%20photon%20flux%20density
Record 3, French
Record 3, Domaine(s)
- Unités de mesure et métrologie
- Information scientifique
- Optique
- Rayonnements électromagnétiques
Record 3, Main entry term, French
- éclairement photonique photosynthétique
1, record 3, French, %C3%A9clairement%20photonique%20photosynth%C3%A9tique
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- densité de flux photonique photosynthétique 2, record 3, French, densit%C3%A9%20de%20flux%20photonique%20photosynth%C3%A9tique
correct, feminine noun
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
éclairement photonique ou (densité de flux photonique) [...] : Quotient du nombre de photon par unités de temps et par unité de surface. Lorsque les photons sont mesurés dans le PAR [400 à 700 nm], on parle alors d'éclairement photonique photosynthétique ou densité de flux photonique photosynthétique (photosynthetic photon flux density, PPFD) 2, record 3, French, - %C3%A9clairement%20photonique%20photosynth%C3%A9tique
Record number: 3, Textual support number: 1 OBS
Il [éclairement photonique] s'exprime en mole de photons par mètre carré et par seconde : [mol/s/m2 ou Einstein/s/m2] 1, record 3, French, - %C3%A9clairement%20photonique%20photosynth%C3%A9tique
Record number: 3, Textual support number: 2 OBS
Les mesures photoniques sont basées sur la quantité de photons qui constituent les radiations mesurées. L'unité de base est la mole de photons aussi nommée Einstein qui correspond au nombre d'Avogadro (6,02.1023) de photon. 2, record 3, French, - %C3%A9clairement%20photonique%20photosynth%C3%A9tique
Record number: 3, Textual support number: 3 OBS
Pour les végétaux, on définit l'éclairement photosynthétiquement actif (PAR) ou éclairement photonique dans la gamme de longueur d'onde 350-750 nanomètres. Cet éclairement tient compte, non pas de la courbe de sensibilité spectrale de l'œil comme l'éclairement lumineux, mais de la courbe du spectre d'action des radiations sur la photosynthèse. Seul l'éclairement énergétique est une donnée réellement objective; l'efficacité réelle des éclairements lumineux et photosynthétiquement actif dépend en fait de paramètres biologiques qui peuvent varier notablement d'un individu à l'autre et même au cours du temps. 1, record 3, French, - %C3%A9clairement%20photonique%20photosynth%C3%A9tique
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2014-11-25
Record 4, English
Record 4, Subject field(s)
- Radiological Physics (Theory and Application)
- Electromagnetic Radiation
- Radiography (Medicine)
Record 4, Main entry term, English
- photoelectric effect
1, record 4, English, photoelectric%20effect
correct, standardized
Record 4, Abbreviations, English
Record 4, Synonyms, English
- photoelectric absorption 2, record 4, English, photoelectric%20absorption
correct, standardized
- photo effect 4, record 4, English, photo%20effect
correct
- Hertz effect 5, record 4, English, Hertz%20effect
obsolete
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
The complete absorption of a photon by an atom with the emission of an orbital electron. 6, record 4, English, - photoelectric%20effect
Record number: 4, Textual support number: 1 CONT
Photoelectric effect, or photoelectric absorption(PEA) is a form of interaction of X-ray or gamma photon with the matter. A low energy photon interacts with the electron in the atom and removes it from its shell.... The incident photon is completely absorbed in the process. Hence it forms one of the reason for attenuation of X-ray beam as it passes through the matter. 3, record 4, English, - photoelectric%20effect
Record number: 4, Textual support number: 1 OBS
Hertz effect: An older term for the photoelectric effect. 5, record 4, English, - photoelectric%20effect
Record number: 4, Textual support number: 2 OBS
photoelectric effect; photoelectric absorption: terms and definition standardized by ISO in 1997. 7, record 4, English, - photoelectric%20effect
Record 4, Key term(s)
- photo-electric effect
- photo-electric absorption
Record 4, French
Record 4, Domaine(s)
- Physique radiologique et applications
- Rayonnements électromagnétiques
- Radiographie (Médecine)
Record 4, Main entry term, French
- effet photoélectrique
1, record 4, French, effet%20photo%C3%A9lectrique
correct, masculine noun, standardized
Record 4, Abbreviations, French
- EPE 2, record 4, French, EPE
masculine noun
Record 4, Synonyms, French
- absorption photoélectrique 3, record 4, French, absorption%20photo%C3%A9lectrique
correct, feminine noun, standardized
- photoeffet 4, record 4, French, photoeffet
correct, masculine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Absorption complète d'un photon par un atome, avec émission d'un électron orbital. 3, record 4, French, - effet%20photo%C3%A9lectrique
Record number: 4, Textual support number: 1 OBS
photoélectrique : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004). 5, record 4, French, - effet%20photo%C3%A9lectrique
Record number: 4, Textual support number: 2 OBS
effet photoélectrique; absorption photoélectrique : termes et définition normalisés par l'ISO en 1997. 6, record 4, French, - effet%20photo%C3%A9lectrique
Record 4, Key term(s)
- effet photo-électrique
- absorption photo-électrique
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Física radiológica (Teoría y aplicación)
- Radiación electromagnética
- Radiografía (Medicina)
Record 4, Main entry term, Spanish
- efecto foto-eléctrico
1, record 4, Spanish, efecto%20foto%2Del%C3%A9ctrico
correct, masculine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
- efecto fotoeléctrico 2, record 4, Spanish, efecto%20fotoel%C3%A9ctrico
correct, masculine noun
Record 4, Textual support, Spanish
Record 5 - external organization data 2011-04-11
Record 5, English
Record 5, Subject field(s)
- Radiological Physics (Theory and Application)
- Radiation Protection
- Chemistry
- Compartment - Canadian Nuclear Safety Commission
Record 5, Main entry term, English
- scattering
1, record 5, English, scattering
correct, standardized
Record 5, Abbreviations, English
Record 5, Synonyms, English
- scatter 2, record 5, English, scatter
noun
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
A process in which a change in direction or energy of an incident radiation is caused by interaction with a particle, a system of particles, or a photon. 3, record 5, English, - scattering
Record number: 5, Textual support number: 1 OBS
scattering: term standardized by ISO. 4, record 5, English, - scattering
Record 5, French
Record 5, Domaine(s)
- Physique radiologique et applications
- Radioprotection
- Chimie
- Tiroir - Commission canadienne de sûreté nucléaire
Record 5, Main entry term, French
- diffusion
1, record 5, French, diffusion
correct, feminine noun, standardized
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Processus dans lequel un changement de direction ou d'énergie d'une particule incidente ou d'un rayonnement incident est causé par une collision avec une particule ou un système de particules. 2, record 5, French, - diffusion
Record number: 5, Textual support number: 1 OBS
diffusion : terme et définition normalisés par l'ISO. 3, record 5, French, - diffusion
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2009-09-15
Record 6, English
Record 6, Subject field(s)
- Atomic Physics
Record 6, Main entry term, English
- incident particle
1, record 6, English, incident%20particle
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
resonance radiation : radiation emitted by an atom or molecule, having the same frequency as that of an incident particle, as a photon, and usually involving a transition to the lowest energy level of the atom or molecule. 1, record 6, English, - incident%20particle
Record 6, French
Record 6, Domaine(s)
- Physique atomique
Record 6, Main entry term, French
- particule incidente
1, record 6, French, particule%20incidente
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Sous le terme d'irradiation, on peut distinguer trois types d'interaction entre les particules incidentes (neutrons, électrons, particules [alpha], ions, fragments de fission ou rayons [gamma]) et un matériau [...] 1, record 6, French, - particule%20incidente
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - external organization data 2005-07-15
Record 7, English
Record 7, Subject field(s)
- Atomic Physics
- Compartment - Canadian Nuclear Safety Commission
Record 7, Main entry term, English
- photoelectron 1, record 7, English, photoelectron
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
An incident gamma ray reacts with an electron in an atomic orbit. The gamma photon gives all of its energy to the orbiting electron and ceases to exist. The electron is ejected from the atom and behaves like a beta particle. The ejected electron is called a photoelectron. 1, record 7, English, - photoelectron
Record 7, French
Record 7, Domaine(s)
- Physique atomique
- Tiroir - Commission canadienne de sûreté nucléaire
Record 7, Main entry term, French
- photoélectron
1, record 7, French, photo%C3%A9lectron
masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Un rayon gamma incident heurte un électron sur une orbite atomique, il lui cède toute son énergie et cesse d'exister. L'électron est éjecté de l'atome et se comporte comme une particule bêta, on appelle cet électron éjecté photoélectron. 1, record 7, French, - photo%C3%A9lectron
Record 7, Spanish
Record 7, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
GCtranslate (available on the Government of Canada network only)
Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified:


