Answer:
24.70 yrs
Explanation:
Using length contraction formula
where v = 0.9910c, Lo = 42.2 light years
L = L₀ = 42.2 = 5.649 yr
to= = 5.649 c.yr / 0.9910c = 5.70yrs
the biological age of Capella = 19 + 5.70 yr = 24.70 yrs
Answer:
the frequency of the wave increases