The Ha line (Hydrogen) of a certain star is received on Earth at a wavelength of 656 nm. What is the star's radial velocity with respect to the Earth?© BrainMass Inc. brainmass.com June 18, 2018, 11:15 am ad1c9bdddf
The radial velocity of an object in, say, km/sec, can be determined from the Doppler shift equation:
<br>v / c = (la - laRe) / laRe
<br>Where v = ...
This job figures a star's radial velocity using Ha lines.