spectrophotometer
actinometer
wavemeter
spectroradiometry
absorptiometer
light unit
ondoscope
absorption band
actinometry
penetrometer
electromagnetic spectrum
ionization chamber
ionization tube
submillimeter wave radiation
emission spectrum
photo-
spark chamber
spark counter
dosimeter
waveband
homochromatic
polychromatic
electromagnetic wave
monochromatic
polarimetry
dosemeter
band
microwave radiation
irradiometer
ESR
electron spin resonance
electron paramagnetic resonance
decametric
absorption spectrum
graser
exposure meter
bolometer
monowavelength
angstrom star
infrared radiation
light spectrum
infrared
infrared emission
radiodosimetry
radio-frequency
roentgenometer
radio wave
infrared light
klystron
gamma radiation
permeameter
photodetector
terahertz radiation
radiometry
electrotomography
Geiger counter
reflector
optical bench
opacity
photoradiometer
line
photometer
radio reflector
high-frequency
radio telescope
light-scattering photometry
ultraviolet spectrum
radiolocation
radar
light
electropollution
ultraviolet
fluoresce
radio detection and ranging
microwave radar
upscattering
radio emission
photometry
atomic emission spectroscopy
source of illumination
radiant
radio radiation
pyrheliometer
actino-
spectroheliometer
radioluminescence
electromagnetometry
absorbance
candle
standard candle
optical density
cd
candela