Artistically speaking - Black, gray, white and all the intermediates are not colors, but rather "values".
If you want scientific - When the eye sees black, there is no EM from wavelengths in the visible spectrum exciting the rods and cones at the rear of the eye. White is all the visible wavelengths. Gray is caused more by the surface reflecting the light than the EM waves themselves. Some white light gets reflected, but some is absorbed as well. This results in an intermediate level of excitation and is based primarily in the rods rather than the color sensitive cones.
There are wavelengths outside of the visible spectrum, but they have nothing to do with black or gray.
i've thought about this b4 too.
like, what if there's thousands of other colors just floatin around but the human eye cannot pick them up, or our eyes perceive stuff different, so what we think is blue is actually, in reality, pink....but then that gets to, what is reality, and then that just ruins the conversation
like, what if there's thousands of other colors just floatin around but the human eye cannot pick them up, or our eyes perceive stuff different, so what we think is blue is actually, in reality, pink....but then that gets to, what is reality, and then that just ruins the conversation
it's not a what-if......there are colors that we can not see. The visible band of the EM spectrum is the minority. We humans can not see infrared, UV, gamma, etc. If you've ever watched video made using UV or infrared sensative cameras.......you know that what is shown on film is drastically different in color than what they same objects look like in the visible spectrum, naked eye. Even then the colors we see are basically UV/infrared images converted to our visible spectrum......and not the true colors.
as for the blue-pink thing........non-issue. Colors are man made words to describe an individual perception. Blue is not blue because of the actual color it is. Blue is blue because the majority of the population percieve this color the same and have labeled it as such.
as for the original topic........doc is right on point.