Q. Consider the following statements:
1.A flat universe model implies that the space is two-dimensional, similar to a sheet of paper.
2.Lambda-Cold Dark Matter is one of the cosmological models that describes our universe’s origin and evolution.
3.The cosmic microwave background (CMB) is considered one of the strongest pieces of evidence supporting the Big Bang theory.
Which of the statements given above are correct?
Explanation –
Statement 1 is incorrect. A flat universe model refers to the curvature of spacetime, not the number of dimensions. This model proposes that while the universe will expand forever, the rate of expansion will gradually decrease due to gravitational forces.
Statements 2 and 3 are correct. Lambda-Cold Dark Matter (ΛCDM) is the most widely accepted cosmological model. It incorporates dark matter, dark energy, and cold dark matter to explain the universe’s origin, expansion, and structure formation. The Cosmic Microwave Background Radiation (CMB) is faint radiation filling the universe, believed to be a leftover afterglow from the Big Bang. The CMB’s properties strongly support the Big Bang theory, as its uniformity and temperature fluctuations align with predictions from the early hot, dense universe.
Source: The Hindu
