Question

As evidence supporting the Big Bang theory, what does the red shift of light from galaxies indicate

Answer 1

The redshift of light from galaxies is a critical piece of evidence supporting the Big Bang theory. It refers to the observed phenomenon where light from distant galaxies appears to have its wavelength stretched towards the red end of the spectrum. This shift in the wavelength of light provides valuable insights into the expansion of the universe.

Firstly, the redshift indicates that galaxies are moving away from us. The greater the redshift, the faster the galaxy is receding from our perspective. This observation aligns with the concept of an expanding universe as predicted by the Big Bang theory. The redshift suggests that galaxies are moving away from each other, creating an expanding space between them.

Secondly, the redshift provides information about the age of the universe. By measuring the redshift of light from galaxies and comparing it with the known properties of light, such as its speed, scientists can estimate the amount of time it took for the light to travel from the source to us. This allows us to determine the age of the universe, which is consistent with the timeline proposed by the Big Bang theory.

Overall, the redshift of light from galaxies serves as convincing evidence supporting the Big Bang theory, as it aligns with the prediction of an expanding universe and provides insights into the age and structure of the cosmos.