Question

The hubble constant has the dimensions of

• A. time
• B. time$^{-1}$
• C. length
• D. mass

Answer 1

Answer: (B)

time$^{-1}$

Answer 2

Hubbles law states that the redshift in light coming from distant galaxies is proportional to their distance from the earth $v=Hd$ where H Hubbles constant. $\therefore$ Dimension of $H=\frac{\text { Dimension of } v}{\text { Dimension of } d}$ $=\frac{[L T]^{-1}}{[L]} =\left[T^{-1}\right]$