What are the Three Key Evidences Supporting the Big Bang Theory?

Explore the three primary evidences of the Big Bang Theory: Cosmic Microwave Background Radiation, Redshift, and Light Element Abundance.

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1. Cosmic Microwave Background Radiation: This is the heat left over from the Big Bang, detected as a uniform background radiation throughout the universe. 2. Redshift of Galaxies: This effect, where light from distant galaxies shifts toward the red end of the spectrum, indicates that the universe is expanding. 3. Abundance of Light Elements: The proportion of hydrogen, helium, and lithium matches theoretical predictions for the quantities formed during the Big Bang nucleosynthesis.

FAQs & Answers

  1. What is cosmic microwave background radiation? Cosmic Microwave Background Radiation is leftover heat from the Big Bang, observed as uniform radiation in the universe.
  2. How does redshift provide evidence for the expanding universe? Redshift occurs when light from distant galaxies shifts to longer wavelengths, indicating that those galaxies are moving away from us, supporting the idea of an expanding universe.
  3. Why is the abundance of light elements significant? The abundance of elements like hydrogen, helium, and lithium matches predictions from the Big Bang nucleosynthesis, providing strong evidence for the Big Bang theory.
  4. What are the implications of the Big Bang theory? The Big Bang theory explains the origin of the universe and its continuous expansion, influencing our understanding of cosmic evolution and the fate of the universe.

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