ultraviolet light, infrared, ultraviolet radiation, photometer, wavelengths, infrared radiation, photochromic, coronagraph, emittance, photolysis, photoluminescence, spectroscopic, rays, airglow, diffract, ultraviolet lamp, photometry, emissivity, unpolarized, photosphere, corona discharge, photocells, sunlight, fluorescent, gamma rays, brightness, reflectivity, luminescence, earthshine, diffraction grating, photometric, ionizing, photochemistry, fluorescence, absorbance, lasers, paramagnetic, reflectance, chemiluminescence, cathode rays, blackbody, cosmic ray, spectroscopy, multispectral, fluorescent lamp, gamma ray, transmittance, nonreflective, hydroxyl, monochromator, attosecond, fluorescent dye, photoactive, emissive, cherenkov radiation, transmissive, fluoresces, bistable, germicidal, electrophoretic, pellicle, ionised, dichroic, phosphide, radiometer, florescence, ionisation, polarimetry, actinic, electroluminescence, auroral, scintillator, gamma radiation, diffraction, photodetector, luminosity, spectra, luminance, spectrometer, rhodamine, kev, opsin, circular polarization, neutron radiation, fluorescence microscopy, photocurrent, corona, photochromatic, illumination, irradiance, eclipsing binary, fluorescein, illuminance, aspherical, uncooled, candelas, photosensitive, spectrophotometer, bolometer, peroxides, halide, cosmic rays, uv, radiation, radiations, photons, bodily, electromagnetic, light, radioactive, spectral, thermal, ap, bleach, downstream, emitters, fertilizer, ray, xray, ir, wavelength, monochromatic, microwave, u.v., laser, nm, pulsed, stroboscopic, submillimeter

denature, eprom, erasable programmable read-only memory, ergosterol, fluor, fluorescent lamp, fluorite, fluorspar, mercury-vapor lamp, ozone, ozone layer, ozonosphere, rochon prism, sun-ray, sunblock, sunray, sunscreen, sun blocker, tanning, ultraviolet illumination, ultraviolet lamp, ultraviolet light, ultraviolet radiation, ultraviolet source, ultraviolet spectrum, uv, wollaston prism, xeroderma pigmentosum

actinic radiation, actinic ray

invisible, unseeable