The shift in the frequency of hydrogen line is 1.65 x 10¹² Hz.
Relationship between frequency and speed of wave
The relationship between frequency and speed of wave is given in the following formula;
v = fλ
Ratio of speed of speed of galaxy to speed of light
[tex]\frac{c}{c_o} = \frac{71.6 \times 10^5}{3 \times 10^8} = 0.00239[/tex]
Shift in the frequency of hydrogen line
The shift in the frequency of hydrogen line is calculated as follows;
[tex]0.00239 \times 6.91 \times 10^{14} = 1.65 \times 10^{12} \ Hz[/tex]
Learn more about speed and frequency of waves here: https://brainly.com/question/19638389
