Term nodes beginning with "P"

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paddy lamp
PAR (abbreviation)
parallel cathode heating (of a discharge lamp)
parallel cathode preheating (of a discharge lamp)
parking light
parting zone (of a road tunnel)
pavement (non-US)
pavement (US)
pavement marking (US)
PBL (abbreviation)
PCS (abbreviation)
PDP (abbreviation)
pelmet lighting
pendant luminaire
percent flicker
perceptual attribute correlate
perfect reflecting diffuser
perfect transmitting diffuser
permissible luminaire
persistence law, von Kries'
phantom sign
phosphor
phosphorescence
photic maculopathy
photobiological dose [Heff]
photobiological fluence (at a point, for a given exposure duration) [Heff,o]
photobiological fluence rate (at a point) [Eeff,o]
photobiology
photocarcinogenesis
photocarcinogenicity
photocataractogenesis
photocathode
photochemical carcinogenesis
photoconductive cell
photocuring
photocurrent [Iph]
photodesensitization
photodiode
photodynamic therapy
photoeffect
photoelectric detector
photoelement
photoemissive cell
photoflash lamp
photoflood lamp
photoimmunology
photokeratoconjunctivitis
photoluminescence
photoluminescence quantum yield
photoluminescence radiant yield
photoluminescent material
photometer
photometer sphere
photometric centre
photometric distance law
photometric inverse square law
photometry
photomorphogenesis
photomultiplier
photomutagenesis
photon
photon counter
photon cylindrical exposure (at a point, for a given direction and duration) [Hp,z]
photon cylindrical irradiance (at a point, for a given direction of incidence) [Ep,z]
photon detector
photon exitance (at a point of a surface) [Mp]
photon exposure (at a point of a surface, for a given duration) [Hp]
photon fluence (at a point, for a given exposure duration) [Hp,o]
photon fluence rate (at a point) [Ep,o]
photon flux [Φp]
photon intensity (of a source, in a given direction) [Ip]
photon irradiance (at a point of a surface) [Ep]
photon number [Np; Qp]
photon radiance (in a given direction, at a given point of a real or imaginary surface) [Lp]
photon radiance dose (in a given direction, at a given point of a real or imaginary surface) [Lt,p]
photon spherical exposure (at a point, for a given exposure duration) [Hp,o]
photon spherical irradiance (at a point) [Ep,o]
photopathology
photoperiod
photoperiodism
photopic vision
photoresistor
photoretinitis
photosensitization
photosynthesis
photosynthetically active radiation
phototaxis
phototherapy
phototransistor
phototropism
phototube
photovoltaic cell
physical colorimetry
physical photometry
PIARC
pin
pin base (US)
pin cap
pixel