Search results
Results From The WOW.Com Content Network
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that small deviations from these values would have extreme ...
The flatness problem is sometimes called one of the Dicke coincidences (along with the cosmological constant problem). [ 34 ] [ 35 ] It became known in the 1960s that the density of matter in the Universe was comparable to the critical density necessary for a flat universe (that is, a universe whose large-scale geometry is the usual Euclidean ...
In cosmology, flatness is a property of a space without curvature. Such a space is called a "flat space" or Euclidean space. [citation needed] Whether the universe is “flat″ could determine its ultimate fate; whether it will expand forever, or ultimately collapse back into itself.
An example of a fine-tuning problem considered by the scientific community to have a plausible "natural" solution is the cosmological flatness problem, which is solved if inflationary theory is correct: inflation forces the universe to become very flat, answering the question of why the universe is today observed to be flat to such a high degree.
Guth's first step to developing his theory of inflation occurred at Cornell in 1978, when he attended a lecture by Robert Dicke about the flatness problem of the universe. [10] Dicke explained how the flatness problem showed that something significant was missing from the Big Bang theory at the time. The fate of the universe depended on its ...
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate.
In manufacturing and mechanical engineering, flatness is an important geometric condition for workpieces and tools. Flatness is the condition of a surface or derived median plane having all elements in one plane. [1] Geometric dimensioning and tolerancing has provided geometrically defined, quantitative ways of defining flatness operationally.
Flatness may refer to: Flatness (art) Flatness (cosmology) Flatness (liquids) Flatness (manufacturing), a geometrical tolerance required in certain manufacturing situations; Flatness (systems theory), a property of nonlinear dynamic systems; Spectral flatness; Flat intonation; Flat module in abstract algebra; Flat morphism in category theory