Example image of eyePlorer eyePlorer map for 'Light': Electromagnetic radiation Human eye Nanometre Visible spectrum Wavelength Physics Particle physics Photon Wave Wave–particle duality Optics Free space Metre per second Metre Galileo Galilei Ole Rømer Io (moon) Jupiter Natural satellite Earth Hippolyte Fizeau Léon Foucault Albert Abraham Michelson California Mirror Mount San Antonio Mount Wilson (California) Time Bose–Einstein condensate Chemical substance Refractive index Transparency and translucency Vacuum Orthogonality Surface normal Refraction Lens (optics) Contact lens Glasses Magnifying glass Microscope Refracting telescope Gloss Glossmeter Matter Aurora (astronomy) Optical phenomenon Rainbow List of light sources Black body