How light enters the brain via eyes (very detailed video)

We discussed secondary qualities. The red apple. Redness is not in the apple's surface. Red happens in the brain as a result of a very complicated process. 

Here is an approximate conversion of anstrom (wavelegnth) to color:

Ultraviolet - Shorter than 3,770 K. units.
Violet - From 3,770 to 4,300 K. units.
Blue - From 4,300 to 4,550 K. units.
Blue Green - From 4,550 to 4,850 K. units.
Green - From 4,850 to 5,400 K units.
Yellow - From 5,400 to 5,900 K. units.
Orange - From 5,900 to 6,300 K. units.
Red - From 6,300 to 7,550 K. units.
Infrared - More than 7,700 K. units.