Related by context. Frequent words. (Click for all words.) 73 electromagnetic radiation 63 magnetic fields 62 electromagnetic fields 60 electromagnetic 58 photons 58 cosmic rays 58 gamma rays 57 infrared radiation 55 microwaves 53 ionosphere 53 cosmic radiation 53 electrons 53 electrical currents 52 radiation emitted 51 laser beams 51 metamaterial 51 ionizing radiation 51 waveguide 51 radiation 51 particles 50 vibrations 50 photon 50 metamaterials 50 terahertz 50 ultraviolet light 49 seismic waves 49 quantum mechanical 49 nerve impulses 49 wavelengths 49 gravitational waves 49 nano particles 49 UV light 49 sun rays 48 electro magnetic 48 diffraction 48 optical fibers 48 subatomic particles 48 millimeter wave 48 emitted 48 electrical impulses 48 electron 48 ultraviolet rays 47 electromagnetic spectrum 47 neutrons 47 solar flares 47 ions 47 radio frequency 47 protons 47 piezoelectric 46 ionization 46 laser beam 46 UV radiation 46 neutrinos 46 infra red 46 particle 46 infrared wavelengths 46 nanotube 45 frequencies 45 atoms 45 cochlea 45 infrared 45 sunlight 45 airborne particles 45 magnetosphere 45 vibrational 44 ionized 44 rays 44 ultraviolet radiation 44 UV rays 44 neutrino 44 dust particles 44 electromagnetic interference 44 electron beam 44 nanotubes 43 radiofrequency 43 gamma radiation 43 gallium arsenide 43 detector 43 resonator 43 refractive index 43 backscatter 43 conductive 43 hydrogen atoms 43 electrode 43 electrical pulses 43 quantum dot 43 antennas 43 nanowire 43 magnetic 43 relativistic 43 orbiting satellites 43 electrochemical 42 microscopic particles 42 electrodes 42 conductivity 42 carbon nanotubes 42 nanometer scale 42 gamma ray 42 quantum dots 42 inductive 42 cosmic microwave background