Related by context. Frequent words. (Click for all words.) 64 visible wavelengths 62 reflectance 61 ultraviolet wavelengths 60 Ultraviolet radiation 59 photoluminescence 59 ultraviolet UV light 59 emissivity 59 irradiance 58 collimated 58 electron density 58 aerosol particles 58 ionisation 58 photometer 57 transmittance 57 absorbance 57 specular 57 noble gases 57 exosphere 57 surface roughness 56 tropospheric 56 anisotropy 56 reflectivity 56 icy moons 56 albedo 56 infrared wavelength 56 photocatalyst 56 elemental composition 56 metallicity 55 obliquity 55 upper troposphere 55 polar craters 55 X ray emission 55 reddish hue 55 electrophoretic 55 dispersive 55 plasmon 55 sorption 55 phosphorescence 55 polar vortex 55 sulphates 55 ultra violet rays 55 optical wavelengths 55 interferometric 54 temperature gradient 54 photosphere 54 shorter wavelengths 54 silicate 54 ionised 54 oxidise 54 Turbidity 54 diffractive 54 chromatic aberration 54 light transmittance 54 isotope ratios 54 Gamma rays 54 photometry 54 directivity 54 sunrays 54 superlens 53 ultraviolet UV 53 refractive index 53 boron nitride 53 gaseous planets 53 atmospheric turbulence 53 isotropic 53 brightness 53 water vapor 53 Martian dust 53 dopant 53 diffracted 53 detectability 53 spectrographs 53 gravitational lens 53 metastable 53 oxidising 53 isotopic composition 53 olivine 53 Ultraviolet light 53 reddish color 53 Earthlike 53 infrared rays 53 manganese oxide 53 passivation 53 nanosized 53 helium atoms 53 textured surfaces 53 fused silica 53 photoresists 53 coating thickness 52 permittivity 52 solar corona 52 fluorocarbons 52 electrical conductivity 52 airflows 52 titania 52 ultraviolet UV radiation 52 water repellency 52 diffraction pattern 52 hydrologic cycle 52 radiative 52 vignetting