Further Contents of E = mc2

Albert Einstein was born in Ulm (Germany) on March 14, 1879. However, his family moved to Munch when he was an infant. There, his family set up a profitable business of manufacturing electric appliances. However, due to the AC revolution, their business became bankrupt.

What happens when the particle has internal space-time structures ?

Did you know that the Dirac equation is a representation of Wigner's little group? Did you know the Maxwell tensor and four vector are also representations of the little group?
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