6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.

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6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.
Transcribed Image Text:6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.
Expert Solution
Concept and Principle:
  • Redshift takes place when the source is moving away from the observer. This reduces the frequency which will in turn increase the wavelength shifting the spectrum to the red side.

 

  • The velocity at which the source is moving away from the observer will be given by,

vc=(z+1)21(z+1)2+1

Here v is the recessional velocity, c is the speed of light, and z is the redshift.

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