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...
List of Vikings episodes. Vikings is a historical drama television series created and written by Michael Hirst for the History Channel. It premiered on March 3, 2013. Vikings was renewed for a fourth season in March 2015 with an extended order of 20 episodes, which premiered on February 18, 2016. On March 17, 2016, History renewed Vikings for a fifth season of 20 episodes planned for 2017.