CMBR is an abbreviation for Cosmic Microwave Background Radiation. It is a type of electromagnetic radiation that is present in the universe. This radiation is emitted by the early universe and is considered to be one of the strongest pieces of evidence for the Big Bang theory. Some synonyms for CMBR include radiation remnants of the Big Bang, cosmic relic radiation, and microwave cosmic background radiation. The study of CMBR is important for scientists as it helps to further understand the early universe, the origins of matter and energy, and the evolution of the universe over time.