Physics 5054 · O Level · The Universe

The Universe — practice question

As seen from the Earth, the light from galaxy X has a lower redshift than the light from galaxy Y. Which galaxy is nearer to the Earth, and which galaxy is moving away from the Earth more quickly?

  • Acloser to the Earth: X; faster recession: X
  • Bcloser to the Earth: X; faster recession: Y
  • Ccloser to the Earth: Y; faster recession: X
  • Dcloser to the Earth: Y; faster recession: Y

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