Related by context. Frequent words. (Click for all words.) 59 infrared rays 58 fluoresces 58 Ultraviolet light 57 visible wavelengths 57 ultraviolet UV light 56 absorbance 56 UV light 56 infrared radiation 56 emissivity 56 ultra violet rays 56 ultra violet light 56 ultraviolet UV 56 photometer 55 ultraviolet 55 radiative 55 ultraviolet wavelengths 54 Gamma rays 54 ultraviolet light 54 reflectance 54 photoluminescence 54 harmful ultraviolet radiation 54 ionisation 54 sunrays 54 Cosmic rays 53 optical wavelengths 53 aerosol particles 53 phosphorescence 53 reflectivity 53 atmospheric turbulence 53 electromagnetic waves 53 ionised 52 ionizing 52 ultraviolet rays 52 near infrared NIR 52 irradiance 52 sun UV rays 52 iridescence 52 ultrasonic waves 52 fluorophores 51 reflective surfaces 51 haloes 51 microwave radiation 51 elemental composition 51 vibrational 51 laser pulse 51 aldehydes 51 ionize 51 sunlight 51 UVB radiation 51 alpha particles 51 cryogenic temperatures 50 refract 50 shorter wavelengths 50 nonlinearity 50 ultra violet radiation 50 radiometer 50 magnetization 50 ultra violet 50 Nitrogen oxides 50 solar corona 50 spectrally 50 metallic sheen 50 fluorescence 50 electron beams 50 water vapor 50 infra red 50 dust particles 50 dye molecules 49 transmittance 49 nanosized 49 photodetector 49 gamma rays 49 translucence 49 dispersive 49 sulphates 49 ultraviolet UV radiation 49 fluorescing 49 electrically conducting 49 Hawking radiation 49 anisotropy 49 airflows 49 luminous flux 49 UV 49 keV 49 surface roughness 49 microstructures 49 photometry 49 sun ultraviolet rays 49 chemically inert 49 cosmic rays 49 wavelengths 49 interferometers 49 magnetic fields 49 rays 49 outgassing 49 X ray emission 49 absorptive 49 emitted 49 airborne particles 49 scintillation 49 radiative forcing