Colour Observed by Enid Verity

By Enid Verity

Colour saw [Loose Leaf]

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In the development of such concepts, Sir Isaac Newton brought precision and organisation and a phenomenal scientific imagination into the field of the investigation of colour theory. Based on his observation that a beam of white light passing through a prism was converted into a continuous band of coloured lights, and that these coloured lights might be reconstituted by the reverse process, he proved that all colours, in the physical sense, are contained in white light. He assumed that light was generated by the emission of particles and wrote: 'Light is neither aether nor its vibrating motion, but something of a different kind propagated from lucid bodies.

Spectroscopy is used in chemistry and physics as a tool for studying the structures of atoms and molecules. It provides a precise analytical method for finding the constituents in materials having unknown chemical composition. Sophisticated spectroscopic methods can provide analysis of the composition of small amounts of material with an accuracy and speed that cannot be achieved by chemical processes. Spectroscopic data on the properties of atoms, ions and molecules is used in the design of lasers, with their wide scientific, industrial and military applications.

The Spanish invasion of Aztec territory in Mexico revealed great new sources of dyestuffs and dyeing processes. Two documents written in the sixteenth century, when Aztec names and usages were still in memory, indicate some of the wealth of natural resources and the skill and ingenuity of the ancient empire. In 1552, Juan Badianus compiled a herbal known as the Badianus Manuscript, listing native plants and their medical usages, with 184 aquarelles beautifully illustrating the text, using orange, yellow, ochre, gamboge, magenta, scarlet, lavender, black and white pigments of very fine quality.

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