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Optics in the GraecoRoman
Optics in the Middle Ages
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accepted Alhazen already angles appeared Avicenna beam of light became called camera obscura Catoptrics century colour completely concave concept conclusion considered corpuscles corpuscular theory crystal crystalline lens Descartes diaphanous bodies diffraction discovery discussed double refraction edge emission emitted ether Euclid existence experimental experiments explain external fact Fermat's Principle fluid Fresnel Galileo geometrical optics glass Grimaldi hole Huygens ideas illuminated images important interest Kepler law of refraction lenses Lucretius lumen luminous Maurolico means measurements mechanism of vision medium mentioned mirror motion namely nature of light Newton object observer obstacle Paralipomena particles phenomena phenomenon philosophers photometry physical physicists plane Porta postulate prism produced Proposition question reached reasoning rectilinear rectilinear propagation reflection Refractione retina seen shadow showed Sidereus Nuncius species spherical surface telescope tion travelled velocity of light vibrations visual rays wave theory wavelength Witelo words