Which of the following is evidence in support of Big Bang theory?
Group of answer choices
a) Blueshifting of light from all distant galaxies and cosmic background radiation detected in all directions
b) Redshifting of light from all distant galaxies and cosmic background radiation detected in all directions
c) Redshifting of light from all distant galaxies and the continued expansion of galaxies
d) Blueshifting of light from all distant galaxies and the continued expansion of galaxies
Answers
Answer:
The earliest and most direct observational evidence of the validity of the theory are the expansion of the universe according to Hubble's law (as indicated by the redshifts of galaxies), discovery and measurement of the cosmic microwave background and the relative abundances of light elements produced by BBN.
Redshifting of light from all distant galaxies and cosmic background radiation detected in all directions. is the correct option.
Two major scientific discoveries provide strong support for the Big Bang theory. Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed and the discovery in the 1960s of cosmic microwave background radiation.
Hubble used spectroscopic red-shift data to measure the speeds these objects were traveling then graphed their distance from Earth against their speed. He discovered that the speed at which astronomical objects move apart is proportional to their distance from each other.