I guess I'm supposed to be impressed with your study of physics..
I have an experiment for ya...
Since black or darkness isn't a colour and it's the absence of light perform this little test and feel free to answer the following inquiry...
Take a blank piece of paper, a complete box of crayons, and mix every color in the box in the same spot on the same piece of paper...
The new "colour" your eyes should register can be described as black or darkness...
But since black or darkness is the absence of light, how do you know this, I mean isn't everthing we see merely an image of a reflection of VISIBLE light, which in itself is but a SMALL portion of the ENTIRE LIGHT SPECTRUM? Or am I incorrect in saying this..?