Parry, Ernest J. (Ernest John), Coste, J. H. (John Henry), b. 1871 · London : Scott, Greenwood ; New York : D. Van Nostrand · leaf 15
r of fact, every vibration of different wave length is refracted to a different degree, the rays of shorter being more refracted than those of longer wave length. Hence the fact that the colours in the spectrum merge gradually into one another, and although each separate position as we advance from… … Fig. 1. main colour is represented in its various shades. For con- venience Newton divided the spectrum into seven parts, starting from the least refracted rays, as follows : Ked, orange, yellow, green, blue, indigo and violet. Any other similar division is quite legitimate — such, for example, as…
Pigments · Paint
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