actinic radiation, actinic ray, color spectrum, ehf, elf, extremely high frequency, extremely low frequency, gamma radiation, gamma ray, hf, high frequency, infrared spectrum, lf, light, line, low frequency, medium frequency, mf, microwave, radio-frequency spectrum, radio frequency, radio spectrum, shf, superhigh frequency, uhf, ultrahigh frequency, ultraviolet spectrum, very high frequency, very low frequency, vhf, visible light, visible radiation, visible spectrum, vlf

spectrum, waveband, wavelengths, infrared radiation, ionosphere, terahertz, infrared, cosmic microwave background, frequencies, polarimetry, diffract, magnetosphere, photosphere, attosecond, celestial sphere, multispectral, heliopause, chromosphere, mesosphere, earthshine, spectral, cosmic ray, gamma rays, heliosphere, quasiparticle, lightwave, photons, radiative, inhomogeneous, auroral, tropopause, airglow, kev, diffraction, demodulate, frequency modulation, excitation, electromagnetic, redshift, geosynchronous, jovian, heterodyne, umbra, dipole moment, plasmon, photoemission, electrons, meteoroids, antiparticle, quasars, gamma ray, blackbody, nernst, moonlet, planck, electromagnetic radiation, celestial equator, exosphere, interstellar space, mev, satellites, cosmic rays, zodiacal light, interferometer, photoelectron, galaxy, ionise, photodetector, troposphere, waveguide, extragalactic, penumbra, photocurrent, retroreflector, pulsars, terrestrial, picosecond, radiolocation, terawatt, spectroscopy, ultraviolet, thermodynamic equilibrium, epsilon aurigae, grond, euchromatin, backscattering, obscuration, alpha particle, isotropic, longitudes, interstellar medium, syrtis major, gigahertz, asteroid belt, quantum mechanical, circular polarization, passband, bolometer, electronvolts, dipoles, ecliptic, amplitudes

spectrum