Question

he Hubble Space Telescope discovered that the light from distant galaxies was being redshifted. Redshift is a phenomenon in which the observed frequency of light is shifted toward the red color spectrum when the source of the light is moving away from the observer. The graph shows the different speeds of galaxies in kilometers per second and their distances from Earth in megaparsecs.



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Which statement does the graph support?


The galaxies farther away from Earth travel the fastest.


The galaxies closer to Earth travel the fastest.


The galaxies farther away from Earth travel at a uniform speed.


The galaxies closer to Earth travel at a uniform speed.


he Hubble Space Telescope discovered that the light from distant galaxies was being redshifted. Redshift is a phenomenon in which the observed frequency of light is shifted toward the red color spectrum when the source of the light is moving away from the observer. The graph shows the different speeds of galaxies in kilometers per second and their distances from Earth in megaparsecs.



image.png



Which statement does the graph support?


The galaxies farther away from Earth travel the fastest.


The galaxies closer to Earth travel the fastest.


The galaxies farther away from Earth travel at a uniform speed.


The galaxies closer to Earth travel at a uniform speed.

Answer 1

The galaxies farther away from Earth travel the fastest.

Reason: The graph shows a positive (roughly linear) relationship between distance and speed — velocity increases as distance increases (Hubble's law: v ∝ d) — so more distant galaxies have higher recessional speeds.