Astrophysics Cosmic microwave background radiation

1. Cosmic Microwave Background
Radiations
The Echo of the Big Bang
Presented by: Maryam
Group Members: 3, 5, 18, 23, 36

2. Introduction
• • What is the Cosmic Microwave Background
(CMB)?
• • Why it is important in cosmology.
• Answer: The Cosmic Microwave Background
(CMB) is the leftover radiation from the Big
Bang, acting as a snapshot of the early
universe. It provides crucial evidence for the
Big Bang theory and helps cosmologists
understand the origin, structure, and

3. Discovery of CMB
• • Discovered by Arno Penzias and Robert
Wilson (1965)
• • Accidental discovery and Nobel Prize in 1978

4. Properties of CMB
• • Uniform radiation at ~2.725 K
• • Detected in microwave region
• • Comes from all directions

5. Origin of CMB
• • Created 380,000 years after the Big Bang
• • Universe became transparent
• • Photons could travel freely

6. Significance of CMB
• • Confirms Big Bang theory
• • Gives information about early universe
• • Helps determine age, shape, and content of
universe

7. CMB Anisotropies
• • Tiny temperature fluctuations
• • Clues to structure formation (galaxies,
clusters)

8. Observations and Missions
• • COBE, WMAP, Planck Satellite
• • Increasingly detailed maps of CMB

9. Conclusion
• • CMB is the "afterglow" of the Big Bang
• • Crucial evidence in understanding universe

10. Q&A / Thank You
• Thank you!
• Any questions?