Download or read book STUDY OF ACCELERATED COSMIC EXPANSION written by Nisha Rani and published by Mohd Abdul Sattar. This book was released on 2022-08-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical cosmology includes the scientific study of the origin, evolution and dynamics of the universe. Due to impressive progress both on the theoretical and observational side, scientists are able to resolve many of the puzzles of the universe. Nevertheless, many questions are not answered completely. For instance, "What are the constituents of the universe?" and "How does the dynamics of the universe evolve?" The curiosity to get convincing answers to these questions, motivates one to work in this field. According to the hot Big Bang model, the universe started from a bang and its properties change with time. The discovery of the Cosmic Microwave Background Radiation (CMBR) by Penzias and Wilson in 1965 was important in making the Big Bang model the accepted model of the universe [5]. A landmark discovery in 1998 by two groups working independently on Supernovae Ia was instrumental in changing the way we understand our universe. They found that the expansion of the universe is accelerating [6, 7]. To explain the accelerated expansion of the universe, various models have been proposed. The most widely accepted one is the Lambda Cold Dark Matter (ΛCDM) model [8]. According to this model, the universe is flat and is expanding at an accelerated rate. It is composed of baryonic matter, dark matter and dark energy. Dark energy is the name given to the cause of the cosmic acceleration.