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Word: kaluza-klein theory
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Meaning:
Noun:
- countable Any of a number of theories that try to explain forces by adding extra dimensions to our spacetime.
- uncountable A (no longer valid) theory developed by physicists Theodor Kaluza & Oskar Klein that attempted to combine gravity & electromagnetism by adding a fifth dimension to our 4-dimensional spacetime.
Source: Wiktionary
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