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The scientific definition of light includes the entire electromagnetic [[spectrum]], not just visible light, so it is scientifically impossible to create perfect darkness. For example, all objects radiate heat in the form of [http://en.wikipedia.org/wiki/Infrared_light infrared light] and [http://en.wikipedia.org/wiki/Gamma_rays gamma rays], extremely high frequency light, can penetrate even dense materials.
The scientific definition of light includes the entire electromagnetic [[spectrum]], not just visible light, so it is scientifically impossible to create perfect darkness. For example, all objects radiate heat in the form of [http://en.wikipedia.org/wiki/Infrared_light infrared light] and [http://en.wikipedia.org/wiki/Gamma_rays gamma rays], extremely high frequency light, can penetrate even dense materials.
==Poetic==
As a poetic term, darkness can also mean the [[presence]] of [[shadow]]s, [[evil]], or [[depression]].
As a poetic term, darkness can also mean the [[presence]] of [[shadow]]s, [[evil]], or [[depression]].
