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AIIMS2005PhysicsGravitation

According to Hubble's law, the redshift (Z) of a receding galaxy and its distance r from earth are related as

Options

  1. AZ r
  2. BZ 1 / r
  3. CZ 1 / r^2
  4. DZ r^ 3 / 2 .

Correct answer

A. Z r

Step-by-step solution

Hubble's law is a statement of a direct correlation between the distance (r) to a galaxy and its recessional velocity as determined by the red shift (Z). It is stated as Z=H₀ r , where Z= recessional velocity H₀= Hubble constant and r= distance.

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