Which does the shift of the hydrogen absorption spectrum of a galaxy provide evidence for? Select the three correct answers.(2 points) Responses expansion of the universe expansion of the universe The Big Bang theory The Big Bang theory number of stars in the galaxy number of stars in the galaxy temperature of the galaxy temperature of the galaxy motion of the galaxy motion of the galaxy composition of the universe
The correct answers are:
- Expansion of the universe: The shift of the hydrogen absorption spectrum towards longer wavelengths (redshift) indicates that the universe is expanding.
- The Big Bang theory: The redshift of the hydrogen absorption spectrum is consistent with the predictions of the Big Bang theory, which describes the initial expansion and evolution of the universe.
- Motion of the galaxy: The shift of the hydrogen absorption spectrum can also provide information about the motion of the galaxy itself.