First published at 05:15 UTC on December 7th, 2018.
an Oxygen atom diameter is half its O2 diameter of 3 angstroms 300 picometers or 0.3 nanometers ,
A photon would travel that distance in 6.87142036 * 10^-19 seconds or
one 1.45530319 * 10^18 th of a second,
over a billion gigahertz for a singul...