Question

How do light waves emitted from galaxies give evidence for the Big Bang theory? Write 3-5 sentences.(4 points

Answer 1

Light waves emitted from galaxies provide crucial evidence for the Big Bang theory through the observation of redshift. As the universe expands, galaxies move away from us, causing the light they emit to shift toward longer wavelengths, a phenomenon known as redshift. This observed redshift correlates with distance; the farther away a galaxy is, the faster it appears to be moving away, consistent with the predictions of an expanding universe rooted in the Big Bang model. Additionally, the cosmic microwave background radiation, a relic of the early universe, supports the notion of a hot, dense state that has since cooled as the universe expanded. Together, these observations reinforce the foundational concepts of the Big Bang theory.