I read that when something moves at the speed of light, length contracts at the direction of motion. Now consider a photon traveling in the z axis. Since it is travelling at the speed of light, the z axis space should shrink to zero length. If there is no space in z direction how can the photon move? Also, for the photon is the universe a 2D plane( If only 3 dimensions exist in this universe)?
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Duplicate of Would time freeze if you could travel at the speed of light? There is no frame of reference for the photon, so "the z axis space should shrink to zero" is a meaningless statement. – ACuriousMind Feb 02 '16 at 17:42
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@ACuriousMind: Could you please provide me an alternate link which explains why the photon doesn't have a frame of reference. The PSE link is not helpful. – Sreeraj Chundayil Feb 02 '16 at 17:46
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And anyone reading this question please provide helpful links as comments before this question gets closed. :) – Sreeraj Chundayil Feb 02 '16 at 17:51
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1See also Does a photon in vacuum have a rest frame? – ACuriousMind Feb 02 '16 at 17:52
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(1) Comments aren't the place for answering the question (2) I don't think this is a duplicate of the one listed in the first comment because that is asking about time, whereas this is asking about space. – David Z Feb 02 '16 at 17:58