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When it absorbs photons
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- In terms of physics, an object is said to be dark when it absorbs photons, causing it to appear dim compared to other objects. For example, matte black paint does not reflect much visible light and appears dark, whereas white paint reflects much light and appears bright.
en.wikipedia.org/wiki/Darkness
Physics. In terms of physics, an object is said to be dark when it absorbs photons, causing it to appear dim compared to other objects. For example, matte black paint does not reflect much visible light and appears dark, whereas white paint reflects much light and appears bright. [2] For more information, see color.
Oct 19, 2023 · Darkness is defined as merely the absence of light. It is mere emptiness. 96% of the universe that humans have observed is darkness.
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May 28, 2014 · Darkness is the absence of visible light. There can be plenty of electromagnetic radiation ("light") around that we simply can't see. Some creatures can see a bit into the infrared or into the ultraviolet, so they "see light" under conditions that we can't.
Jun 20, 2013 · Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
Feb 15, 2013 · Physicist: The very short answer is no: darkness is not a wave. There are no waves in the dark for very much the same reason that there’s no surfing (or ocean waves) in Death Valley. Darkness, being an absence of electromagnetic waves (light) has nothing to do any waving.
Dark matter makes up most of the mass of galaxies and galaxy clusters, and is responsible for the way galaxies are organized on grand scales. Dark energy, meanwhile, is the name we give the mysterious influence driving the accelerated expansion of the universe.
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May 22, 2023 · Darkness travels at the speed of light. More accurately, darkness does not exist by itself as a unique physical entity, but is simply the absence of light. Any time you block out most of the light – for instance, by cupping your hands together – you get darkness.
