Page 11 - Understanding light, colour and hair colour
P. 11
When cyan, magenta and yellow beams were reflected on the wall, where
the three colours overlapped they would create three new colours red, blue
and green and where all six colours overlapped, would cause the Retina rod
cells to become excited all at the same time, and the colour they would
Another experiment by Young-Helmholtz the theory of colour vision recognise is black. (Please see Fig. 10)
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)
