Page 7 - Understanding light, colour and hair colour
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Newton’s circular electromagnetic spectrum explains that there is no The existence of varying visible wavelengths was confirmed by Newton,
individual wavelength for the colours purple, or brown. A purple hue emits when he used a glass prism to absorb white light, he found the prism
from a mixture of invisible wavelengths between Gamma rays at 100th of a refracted the white light as individual wavelengths. (Fig5.)
nano metre and Radio waves 1 meter or longer. Also if equal amounts of
three or more wavelengths in the visible spectrum are reflected, the colour
brown will be visible. (Please see Fig4.)
Newton’s experiment with the prism explained Absorption and Refraction as
seen by the human eye.
The prism is made of glass without pigments. Thereby, it is completely
transparent. When all the visible wavelengths in white light (Daylight) are
absorbed they separate into individual wavelengths at different angles when
refracted.
