Related by context. Frequent words. (Click for all words.) 72 laser beam 69 lasers 61 laser 57 magnetic fields 56 photons 54 gamma rays 53 infrared 52 photon 52 beams 51 electromagnetic waves 51 infra red 50 strobe light 50 wavelengths 50 infrared radiation 50 rays 49 strobe 49 electromagnetic 48 ultraviolet light 48 electrical currents 48 lightning bolts 48 fireballs 47 ionosphere 47 diffraction 47 gamma ray 47 searchlights 47 strobe lights 47 electrons 46 electrodes 46 prisms 46 subatomic particles 46 holographic 45 optic 45 optically 45 protons 45 projectiles 45 magnetic 45 tracer 45 fluorescent 45 orbs 45 cosmic rays 45 wavelength 45 neutrons 45 gravitational waves 45 electron 44 electron beam 44 ultraviolet 44 electromagnetic radiation 44 beam 44 particles 44 atoms 44 magnetically 44 emitted 44 spherical 43 infrared sensors 43 fluorescence 43 electrical impulses 43 auroras 43 microwaves 43 quantum dots 43 tracers 43 starlight 43 electrically charged 43 optical fibers 43 Lasers 43 neutrinos 43 reflectors 43 quantum dot 43 spectrograph 43 suns 43 terahertz 42 illumination 42 apertures 42 solar flares 42 telescope 42 refraction 42 waveguide 42 detector 42 filaments 42 retinas 42 telescopes 42 arrows 41 sky 41 sun rays 41 holograms 41 neutron 41 detectors 41 neutrino 41 supermassive black hole 41 vibrational 41 infrared wavelengths 41 projectile 41 UV light 41 blinking lights 41 ions 41 gamma radiation 41 spectrometers 40 electrically 40 quasar 40 luminescent 40 light emitting diodes 40 distant galaxies