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