5D (other)
5D or 5-D may refer to: Math, science, and technology *Five-dimensional space *Canon cameras: **Canon EOS 5D ** Canon EOS 5D Mark II ** Canon EOS 5D Mark III **Canon EOS 5D Mark IV *Konica Minolta Maxxum 5D, Dynax 5D, or DG-5D, a digital camera * Little finger, the fifth digit (abbreviated 5D) of the hand Arts and media *'' Yu-Gi-Oh! 5D's'', a Japanese anime series *5D, the production code for the 1978 ''Doctor Who'' serial ''The Androids of Tara'' *"5D", a song by Death Grips on their 2011 mixtape ''Exmilitary'' *"5D (Fifth Dimension)", a 1966 song by the Byrds Other uses * Aeroméxico Connect (IATA code D5) See also * D5 (other) *Fifth Dimension (other) Fifth Dimension or fifth dimension may refer to: * Five-dimensional space, a mathematical concept or construct * The 5th Dimension, a pop music vocal group debuting in the 1960s * ''5th Dimension'' (album), a 2013 album by Momoiro Clover Z * ''Fi ...

Five-dimensional Space
A five-dimensional space is a space with five dimensions. In mathematics, a sequence of ''N'' numbers can represent a location in an ''N''-dimensional space. If interpreted physically, that is one more than the usual three spatial dimensions and the fourth dimension of time used in relativistic physics. Whether or not the universe is five-dimensional is a topic of debate. Physics Much of the early work on five-dimensional space was in an attempt to develop a theory that unifies the four fundamental interactions in nature: strong and weak nuclear forces, gravity and electromagnetism. German mathematician Theodor Kaluza and Swedish physicist Oskar Klein independently developed the Kaluza–Klein theory in 1921, which used the fifth dimension to unify gravity with electromagnetic force. Although their approaches were later found to be at least partially inaccurate, the concept provided a basis for further research over the past century. To explain why this dimension would no ...
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