Quantum electrodynamics, commonly referred to as QED, is a quantum field theory of the electromagnetic force. Taking the example of the force between two electrons, the classical theory of electromagnetism would describe it as arising from the electric field produced by each electron at the position of the other.
Season 2. Season 4. Season 3 of Vikings premiered on February 19, 2015 on History in Canada and in the United States and concluded on April 23, 2015, consisting of 10 episodes. The new 10-episode season begins with...
It premiered on March 3, 2013. On March 25, 2014, History renewed Vikings for a third season of 10 episodes, which premiered on February 19, 2015. On March 26, 2015, History renewed Vikings for an extended fourth season of 20 episodes.As of April 23, 2015, 29 episodes of Vikings have aired, concluding the third season.n March 26, 2015, History renewed Vikings for an extended fourth season of 20 episodes. As of April 23, 2015, 29 episodes of Vikings have aired, concluding the third season.