microwave
mediumwave infrared
radio frequency
infrared
infrared frequency
space wave
light wave
submillimeter wave radiation
fluorescence
radio emission
radio wave
radio radiation
waveband
emission spectrum
absorption spectrum
infrared spectrum
visible light
infrared ray
terahertz radiation
near infrared
electromagnetic wave
wave number
infrared light
Hertzian wave
infrared emission
infrared radiation
gravitational redshift
absorption band
red shift
radioelectricity
light spectrum
æther wave
sunbeam
wave theory of light
undulatory theory
wave theory
eradiation
electromagnetic spectrum
airwaves
band
maximum usable frequency
redshift
spectral line
optical astronomy
ESR
refraction
transmission density
electron paramagnetic resonance
photographic density
electron spin resonance