COLOUR         :

               Visual sensation. In a dull world this does NOT

               exist. Neither in ONE which is only black AND

               white. In our world, when there is enough light

               we can SEE COLOUR s, like spring GREEN leaves OR

               a BLOOD RED setting SUN. There are two

               different kind of light receptors in the eye,

               NAMEd after their shapes: rods AND cones. The

               cones, which are able to respond to light of

               different COLOURs predominate in the "yellow"

               area of the retina directly opposite the lens

               AND close to the "blind spot" where the optic

               nerve leaves the eye. The rods which can only

               provide black-grey-white information are more

               common in the rest of the eye AND are

               responsible for peripheral vision. The rods are

               much more sensitive (to light) than the cones

               AND this is the reason why we can NOT SEE

               COLOURs in near darkness.

               :

               A quantum number of QUARKS.