for scene 17 of the video " Big Bang Blow-Out 1: Entropy versus Anti-entropy" by Rolf Witzsche
here for a larger image
Light consists of photons that are individual entities
However, because light consists of photons that are complete individual entities that are of a specific size for a specific color, and the size of the photon is determined by the energy it contains, the size can change when its energy is dissipated on the path of its travel over extremely long distances.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.