With the aid of a diagram, explain the physical origin of cosmological redshift in an expanding universe, and how this differs from the Doppler shift due to relative motion. Observations of distant galaxies indicate that their recession velocities, v, and their distances, d, follow a Hubble Law: v = H0d, where H0 is a constant. Using the analogy of an expanding grid or ruler, demonstrate that Hubble’s Law indicates that the Universe is undergoing uniform expansion.
With the aid of a diagram, explain the physical origin of cosmological redshift in an expanding universe, and how this differs from the Doppler shift due to relative motion. Observations of distant galaxies indicate that their recession velocities, v, and their distances, d, follow a Hubble Law: v = H0d, where H0 is a constant. Using the analogy of an expanding grid or ruler, demonstrate that Hubble’s Law indicates that the Universe is undergoing uniform expansion.
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With the aid of a diagram, explain the physical origin of cosmological redshift in an expanding universe, and how this differs from the Doppler shift due to relative motion. Observations of distant
galaxies indicate that their recession velocities, v, and their distances, d, follow a Hubble Law:
v = H0d, where H0 is a constant. Using the analogy of an expanding grid or ruler, demonstrate
that Hubble’s Law indicates that the Universe is undergoing uniform expansion.
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