What are the three basic problems with the standard of the big bang cosmology? a. 1. horizon problem 2. flatness problem 3. structure problem. Since you asked a technical question, I hope you don't mind if I give you a slightly technical answer. First, let's define terms. Thesis: Master .
ask questions! de Sitter problem, i.e. It is difficult to explain the observed uniformity of the observable universe without resorting to 'inflation'. The flatness problem effectively is a fine-tuning problem that states if omega has slight deviations from +1 (of the order 1e-62) then the universe of today would not be able to sustain galaxies or other large structures.
Inflation's resolution to the flatness problem - as well as its other miracles, solving the horizon, relic, and structure formation problems - lies in the simple fact that during inflation the comoving horizon size shrinks with time rather than growing.
We have used the varying physical constant approach to resolve the flatness problem in cosmology. Friedmann equations are modified to include variability of speed of light, gravitational constant, cosmological constant and the curvature constant.
Some Philosophy 12/1/11 4 From 10-10 seconds to today the history of the universe is based on well understood and experimentally tested laws of particle physics, nuclear and atomic physics and gravity. Supervisor: Vera Kistiakowsky. Roberta Brawer. What idea solves the three basic problems?
What is the horizon problem?
the question is why the universe is (in some sense) close to the Einstein– de Sitter model (which is an unstable fixed point and a repulsor) today when jlj and Ω can take on values between 0 and ¥. It arises due to the difficulty in explaining the observed homogeneity of causally disconnected regions of space in the absence of a mechanism that sets the same initial conditions everywhere. 0 Citations.
Choose one answer.
Why is flatness a problem in cosmology? The measurement of _today's_ omega (omega_0) is also very close to +1 (which is what forces the initial condition limit). MIT (1996) pdf cite. inflation. Citations per year.
1996. The "horizon problem" is the fact that the observable Universe is too uniform. b. The universe appears to be flat to within observational error, yet the universe is expanding, and it is impossible for an expanding universe to be flat. The horizon problem (also known as the homogeneity problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Inflationary cosmology and horizon and flatness problems : the mutual constitution of explanation and questions. 81 pages. The continuity equation obtained with such modifications includes scale factor dependent cosmological term as well as the curvature term along … However, for brevity I will continue to use the term ‘flatness problem’ even for the more general case and sometimes mention only the change in Ωwith time.
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