| Subject | English | Spanish |
| el. | annihilation photon | fotón de aniquilación |
| earth.sc. | ideal photon receiver | receptor ideal de fotones |
| light. | number of photons | número de fotones |
| phys.sc., el. | optical photon | fotón óptico |
| el. | photon absorption | absorción de radiación |
| el. | photon absorption | absorción de fotones |
| gen. | photon-backscatter sensor | detector de retrodispersión fotónica |
| light. | photon counter | contador de fotones |
| laser. | photon counting | recuento de fotones |
| el. | photon-counting | recuento de fotones |
| el. | photon coupling | acoplamiento por fotones |
| phys.sc., transp. | photon drive | propulsión fotónica |
| el. | photon-electron energy transition | transición de energía fotoelectrónica |
| el. | photon-electron energy transition | rendimiento fotoeléctrico |
| phys.sc., el. | photon emission | emisión fotónica |
| earth.sc. | photon emission curve | curva de emisión de fotones |
| laser. | photon emittance | emitancia fotónica |
| mech.eng. | photon engine | motor fotónico |
| health. | photon equilibrium | equilibrio de fotones |
| light. | photon exitance at a point of a surface | exitancia fotónica |
| light. | photon exposure at a point of a surface, for a given duration | exposición fotónica |
| phys.sc. | photon field | campo de fotones |
| laser. | photon flow | flujo fotónico |
| laser. | photon fluence | fluencia fotónica |
| laser. | photon fluence rate | velocidad de fluencia fotónica |
| laser. | photon flux | flujo específico fotónico |
| light. | photon flux | flujo fotónico |
| el. | photon-induced exciton | excitón inducido fotónicamente |
| light. | photon intensity of a source, in a given direction | intensidad fotónica |
| laser. | photon irradiance | irradiancia fotónica (E^ |
| light. | photon irradiance at a point of a surface | irradiancia fotónica |
| commun., IT | photon noise | ruido de fotón |
| antenn., opt. | photon noise | ruido fotónico |
| antenn., opt. | photon noise | ruido cuántico |
| light. | photon number | número de fotones |
| light. | photon radiance in a given direction, at a given point of a real or imaginary surface | radiancia fotónica |
| phys.sc. | photon radiation | radiación fotónica |
| laser. | single photon counting | recuento de fotones individuales |
| med. | single photon emission computed tomography | tomografía por emisión de fotones |
| comp., MS | single-photon emission computed tomography | tomografía computarizada por emisión de fotón único (A type of computed tomography (CT) scan in which a small amount of a radioactive drug is injected into a vein) |
| med. | single photon emission computed tomography | tomografía de emisión monofotónica |
| med. | single photon emission computed tomography | tomogammagrafía de emisión de fotón sencillo |
| med. | single photon emission computed tomography | tomografía computarizada por emisión de un solo fotón |
| laser. | single photon timing | análisis temporal de fotones individuales |
| meas.inst. | sodium photon counter | contador de fotones a sodio |
| laser. | specific photon emission | emisión fotónica específica |
| laser. | spectral photon exitance | exitancia fotónica espectral |
| laser. | spectral photon flow | flujo fotónico espectral |
| laser. | spectral photon flux photon irradiance | flujo específico fotónico espectral (irradiancia fotónica) |
| laser. | spectral photon radiance | radiancia fotónica espectral |
| laser. | time-correlated single photon counting | recuento de fotones individuales correlacionados temporalmente |
| med. | tomoscanning with photon-emitting elements | tomoescintigrafía con elementos emisores de fotones |
| laser. | two-photon excitation | excitación de dos fotones |
| laser. | two-photon process | proceso de dos fotones |
| health., nat.sc. | ultraviolet photon | fotón ultravioleta |