Page 10 - Understanding light, colour and hair colour
P. 10
Another experiment by Young-Helmholtz the theory of colour vision
confirms how we use the Retina cone and rod cells. Imagine being in a
darkened room after a few seconds our eyes adjust using our Retina rod
cells we start to see dark shapes. Suddenly three light beams shine on the
far wall one red one green and one blue. As they overlap three secondary
colours form yellow, magenta and cyan.
Where all six colours overlap the three different types of Retina cone cells
all become excited at the same time, and the colour white is recognised
through the human eye.
(Please see Fig. 9)
