Related by context. Frequent words. (Click for all words.) 77 wavelength 73 infrared wavelengths 67 photons 63 infrared radiation 63 spectra 61 infrared 60 redshift 60 photon 60 gamma rays 59 fluorescence 58 ultraviolet 57 distant galaxies 57 intensities 56 diffraction 56 nuclei 56 optical fibers 56 terahertz 56 frequencies 55 spectral 55 magnetic fields 55 spatial resolution 55 electromagnetic spectrum 54 atoms 54 bandwidths 54 spectroscopic 54 waveguide 54 UV light 54 gamma ray 54 ultraviolet light 54 tunable 53 quantum dots 53 quasar 53 galaxies 53 molecules 53 quasars 53 neutrons 53 brightness 52 hydrogen atoms 52 electrons 52 nanocrystals 52 reflectance 52 μm 52 galaxy clusters 52 spectrometer 52 UVB 51 spectroscopy 51 refractive index 51 excitation 51 nanometers 51 voltages 51 gamma ray bursts 51 filaments 51 metamaterial 51 quantum dot 51 gamma ray burst 51 spectrometers 51 optical 50 micrometers 50 reflectivity 50 luminosity 50 neutrinos 50 laser beams 50 telescopes 50 metamaterials 50 magnetosphere 50 cosmic rays 50 CCDs 49 microns 49 electromagnetic waves 49 electron 49 apertures 49 micrometer 49 conductance 49 qubit 49 neutrino 49 refraction 49 #nm [003] 48 infra red 48 qubits 48 photonic 48 starlight 48 orbits 48 oxygen atoms 48 arrays 48 laser beam 48 luminescence 48 resonator 48 ionosphere 48 pulsars 48 optically 48 ions 48 organic molecules 48 auroras 48 UV radiation 47 velocities 47 pulses 47 pixels 47 particles 47 nanotube 47 luminance 47 nebula