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2 External links 3 Flatness in cosmology 4 External links |
Joseph Whitworth invented the first practical method of making and polishing accurate flat surfaces in 1830. This used engineer's blue and polishing techniques using three trial surfaces. This led to an explosion of development of precision instruments using his flat surfaces as a basis for further construction of precise shapes.
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In cosmology, a question often asked is "is the Universe flat"? According to the Theory of Relativity, it probably is curved and warped due to gravity.
See also:
Flatness in mechanical engineering
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Flatness in cosmology
External links