Page 4 - HAIR COLOUR
P. 4
Chapter 1
White Light and Hair Colour
To understand hair colour, we first have to understand Light.
Let’s look at what the scientists tell us about light and colour.
How is light created? Light is created when atoms are exited by an
Energy source (Sun in daylight, electrically charged tungsten and neon
bulbs for artificial light). Once exited some atoms drop their electrons
releasing photons. Seven of these photons vary in colour; these colours
are determined by the amount of energy released by those particular
atoms. Photons of the same energy and colour go on to form a light
particle; many particles go on to form a wavelength. (Fig 1.)
4
