silent_please Posted November 27, 2012 Share Posted November 27, 2012 What is darkness actually?? I heard people talking about anti photons..What are they? Link to comment Share on other sites More sharing options...
imatfaal Posted November 27, 2012 Share Posted November 27, 2012 Darkness is lack of light - the absence of photons; there is no need to talk about anti-photons. In fact photons are their own antiparticle ie photons and anti-photons are indistinguishable - so we don't really think of them in these terms at all. Link to comment Share on other sites More sharing options...
elnetrino Posted December 4, 2012 Share Posted December 4, 2012 I agree with imatfaal.Darkness is lack of light. In order for an observer to observe and 'see' the darkness of a subject, that subject should not emit any visible light towards the observer. See for example in a recent Astronomy Picture of the Day the dark Pipe Nebula http://apod.nasa.gov/apod/ap121123.html Link to comment Share on other sites More sharing options...
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