Question
Question: According to Hubble's law, the redshift \((\overset{̶}{Z})\) of a receding galaxy and its distance r...
According to Hubble's law, the redshift (\overset{̶}{Z}) of a receding galaxy and its distance r from earth are related as
A
\overset{̶}{Z} \propto r
B
\overset{̶}{Z} \propto 1/r
C
\overset{̶}{Z} \propto 1/r^{2}
D
\overset{̶}{Z} \propto r^{3/2}
Answer
\overset{̶}{Z} \propto r
Explanation
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=Hr .