A photon`s point of view
Monday, August 8, 2011 - 09:00
in Astronomy & Space
From a photons point of view, it is emitted and then instantaneously reabsorbed. This is true for a photon emitted in the core of the Sun, which might be reabsorbed after crossing a fraction of a millimetres distance. And it is equally true for a photon that, from our point of view, has travelled for over 13 billion years after being emitted from the surface of one of the universes first stars.