Astrophysics and cosmology

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Question 16

Medium

According to Hubble's law, the recessional velocity $v\,$ of a distant galaxy is proportional to its distance $d\,$ from Earth, such that $v = H_0 d$ , where $H_0\,$ is the Hubble constant. For relatively nearby galaxies, the cosmological redshift $z\,$ is given by $z≈vc\displaystyle z \approx \frac{v}{c}$ , where $c\,$ is the speed of light in a vacuum.

If a graph of redshift $z$ (on the vertical axis) is plotted against distance $d$ (on the horizontal axis), which of the following expressions represents the gradient of the line of best fit?

$cH0\frac{c}{H_0}$

$H_0 c$

$H0c\frac{H_0}{c}$

$1H0\frac{1}{H_0}$

Astrophysics and cosmology

Question 16

Astrophysics and cosmology Questions

Astrophysics and cosmology

Question 16

Astrophysics and cosmology Questions