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I propose that dark has subsets, humans perceive dark as the absence of frequency of 400nm-800nm, a state rather than an absolute.
Quote from: TheboxI propose that dark has subsets, humans perceive dark as the absence of frequency of 400nm-800nm, a state rather than an absolute.Your proposal would be rejected by any physicist. Darkness is merely the absence of visible light. That's all there is to it.
... there is not any evidence to suggest that light exists outside of the brain?
Quote from: Thebox on 06/04/2015 13:09:24... there is not any evidence to suggest that light exists outside of the brain?What about the existence of ...sorry, you cannot view external links. To see them, please
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Conventionally, light is that part of the electromagnetic spectrum that can induce transient chemical effects such as vision. The extent of the visible spectrum depends on species and individual characteristics.You can of course see "direct" light from stellar objects and "indirect" (i.e. relfected) light from moons and planets.Plants respond to light by various means which are entirely analogous to animal responses, i.e. chemical change inducing movement, color change, and the synthesis of longterm metabolites. Various animal species respond to light despite having no evidence of a brain or image-forming equipment.It's not a good idea to adopt idiosyncratic definitions of scientific terminology. At best, nobody else will understand you, and at worst, you will confuse yourself.