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Cambridge IGCSE Physics practice

What does the Hubble constant measure?

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The Universe

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What does the Hubble constant measure?.

  1. A.The distance of galaxies
  2. B.The speed of light
  3. C.The rate of expansion of the universe
  4. D.The mass of galaxies

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Understanding the Hubble Constant

The Hubble constant relates the speed of galaxies to their distance from Earth. It is defined by the equation v = H₀d, where v is the velocity of a galaxy, H₀ is the Hubble constant, and d is the distance to the galaxy.

  1. a

    State the definition of the Hubble constant.

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