Example image of eyePlorer eyePlorer map for 'Color': Human Physical property Visual perception Light Photoreceptor cell Visible spectrum Wavelength Color space Nanometre Physics Psychology Cone cell Retina Physiology Psychophysical Art Color theory Electromagnetic radiation Frequency Metamerism (color) Isaac Newton Latin Rainbow Hertz Refraction Vacuum Language Spectrum Indigo Brown Color constancy Absorption (electromagnetic radiation) Opacity Reflection (physics) Scattering Chemiluminescence Incandescence List of light sources Phosphorescence Fluorescence Aristotle Color vision Johann Wolfgang von Goethe Theory of Colours (book) Thomas Young (scientist) Trichromacy Hermann von Helmholtz James Clerk Maxwell Color blindness Ewald Hering