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...
When TVLine reported on History renewing Vikings for a 20-episode fourth season, the website also said, Viewers will get 10 episodes in a row before thereâs a break, with the second half to air sometime later in 2016.. There still isn't an official return date, but I would estimate a return sometime in the fall.