General Relativity (GR) is a cornerstone of modern physics, describing gravity as the curvature of space-time due to the presence of mass and energy. It provides a mathematical foundation for understanding gravitational interactions, including the bending of light by massive objects. Cosmology, a distinct scientific discipline, applies GR to study the universe's large-scale structure and evolution through mathematical modeling. In recent years, higher-dimensional theories such as Kaluza-Klein (KK) theory have attracted significant interest in cosmology and astrophysics. Introduced by Theodor Kaluza and Oskar Klein, this theory extends GR into a five-dimensional framework, offering potential insights into unifying gravity with other fundamental forces. It posits that our four-dimensional universe may have emerged from a higher-dimensional phase, where additional spatial dimensions became compactified and unobservable over time. By incorporating higher-dimensional space-time theories into cosmology, this work aims to provide a deeper understanding of the early universe and its large-scale dynamics, offering new perspectives on fundamental questions about cosmic evolution. Dr Vaishali H. Kamdi did her Doctorate of Philosophy in physics from Rashtrasant Tukadoji Maharaj Nagpur University of Nagpur in 2012. She was worked as Scientific officer in Eco Friendly Diamond CVD production plant, Andheri, Mumbai.
