Posted: Sep 07, 2019 8:14 pm
"Black" is the name you give to things that don't trigger the receptors in your eye. Those receptors are triggered by EM radiation in the range of about 380 to 740 nanometers. Space doesn't emit or reflect light in those wavelengths of sufficient intensity.
I'm going to ignore the traditional equivocation between, and argument over, the "thing we perceive as black" and "the thing that causes us to perceive black", since it's (as always) present in the question rather than the answer. What we mean by "the sky is blue" or "space is black" has nothing to do with perceptions, it's about physical properties (that we can perceive).
I'm going to ignore the traditional equivocation between, and argument over, the "thing we perceive as black" and "the thing that causes us to perceive black", since it's (as always) present in the question rather than the answer. What we mean by "the sky is blue" or "space is black" has nothing to do with perceptions, it's about physical properties (that we can perceive).