light unit
photo-
actinometry
spectroradiometry
absorption spectrum
opacity
actinometer
polarimetry
emission spectrum
electromagnetic wave
spectrophotometer
glow
glowing
radiance
absorption band
gamma radiation
electronic smog
bandshape
photoconductivity
radiodosimetry
light spectrum
radio energy
radiation dose
photoelectric effect
fluorescence
photoconduction
band
electromagnetometry
photographic density
infrared
infrared radiation
absorbance
upscattering
infrared light
infrared emission
transmission density
optical density
photoinduced
electronic reconnaissance
gamma ray
radio wave
infrared spectrum
mediumwave infrared
microwave radiation
ultraviolet
electropollution
radio-frequency
homochromatic
fluoresce
monochromatic
ultraviolet spectrum
electromagnetic spectrum
extinction
dose rate
electromagnetics
source of illumination
electromagnetism
ultraviolet radiation
polychromatic
reradiation
transparency
transparence
radio emission
radio radiation
langley
electrosmog
absorptance
raypath
absorption coefficient
coefficient of absorption
electron beam
beam
infrared frequency
X-radiation
beamwidth
reabsorption
radiopacity
backscatter
ray
fluorescent
light
radio-opacity
X-ray
roentgen ray
X ray
radiocautery
radio
warm
ionization chamber
field strength unit
broadband
radioluminescent
monoenergetic