petrushka.googol Posted October 30, 2015 Share Posted October 30, 2015 When did the first photon emerge in the timeline of the Universe ? And how did all photons automatically get modulated to a velocity of 3 x 108 m/s ? Link to comment Share on other sites More sharing options...
Sensei Posted October 30, 2015 Share Posted October 30, 2015 (edited) And how did all photons automatically get modulated to a velocity of 3 x 108 m/s ? It's 299792458 m/s. In the natural units, it's normalized to 1. And the all massive particles velocities are fractions of it. https://en.wikipedia.org/wiki/Natural_units Edited October 30, 2015 by Sensei Link to comment Share on other sites More sharing options...
mathematic Posted October 31, 2015 Share Posted October 31, 2015 Photons came with the big bang. Link to comment Share on other sites More sharing options...
pavelcherepan Posted October 31, 2015 Share Posted October 31, 2015 When did the first photon emerge in the timeline of the Universe ? And how did all photons automatically get modulated to a velocity of 3 x 108 m/s ? Which photons are you referring to? First photons that we're capable of detecting? It's about 380000 years after the Big Bang, nowadays known as Cosmic Microwave Background Radiation. I believe that photons, from the moment of their creation always move at c, they can't exist any other way. It's 299792458 m/s. Wow! And some people say that I like to nit-pick... Link to comment Share on other sites More sharing options...
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