Example image of eyePlorer eyePlorer map for 'Refractive index': Refraction Soda-lime glass Lens (optics) Light Phase velocity Sound Wave Earth's atmosphere Pressure Temperature Vacuum Permeability (electromagnetism) Permittivity X-ray Total external reflection Phase (waves) Waveform Amplitude Group velocity Optical fiber Speed of light Cherenkov radiation Absorption (electromagnetic radiation) Signal (electronics) Signal velocity Theory of relativity Electric field Electron Scattering Snell's law Poincaré group Metamaterial Negative refraction Superlens Polarization density Complex number Frequency Direct current Electrical conductivity Insulator (electrical) Refractive index Mathematical descriptions of opacity Wavelength Chromatic aberration Color Dispersion (optics) Dispersive prism Rainbow Kramers–Kronig relation Emission spectrum