According to Hubble's law,the redshift (Z) of | vedclass

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(A) Hubble's law states that the recessional velocity $(v)$ of a galaxy is directly proportional to its distance $(r)$ from the observer.Mathematicall

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$Z \propto r$

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(A) Hubble's law states that the recessional velocity $(v)$ of a galaxy is directly proportional to its distance $(r)$ from the observer.Mathematically,this is expressed as $v = H_0 r$,where $H_0$ is the Hubble constant.Since the redshift $(Z)$ is directly proportional to the recessional velocity $(v)$ for non-relativistic speeds,we have $Z \propto v$.Substituting the relationship,we get $Z \propto r$.Therefore,the redshift of a receding galaxy is directly proportional to its distance from Earth.

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

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