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Continue to ChatOne may conceive light to spread successively, by spherical waves. - Christiaan Huygens from https://whatsmyquote.com/quote/one-may-conceive-light-to-spread-successively-by-spherical-waves
One may conceive light to spread successively, by spherical waves. - Christiaan Huygens from https://whatsmyquote.com/quote/one-may-conceive-light-to-spread-successively-by-spherical-waves