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Is light a particle, a wave, or a bunch of tiny, photon-gathering horses?

Check out the wave-particle duality as presented by Colm Kelleher and animated by Nelson Diaz for TEDEd; it's a clever explanation to a longtime quantum conundrum. Even better: it's delivered with a lilting Irish accent — which makes the historical bit about the eye-horses that much more entertaining. »1/21/13 6:40am1/21/13 6:40am