The wavelength of the h-alpha absorption line that you would detect in the star's spectrum will be 54.67 * [tex]10^{-2}[/tex] nm
If the object is moving towards or away from us with some radial velocity, shifts can be observed in the location of the absorption
since, material is moving towards us a shift to shorter wavelength will be observed
shift = rest wavelength * ( radial velocity / speed of light )
= 656 * [tex]10^{-9}[/tex] * (250 * [tex]10^{3}[/tex] / 3 * [tex]10^{8}[/tex] )
= 54.67 * [tex]10^{-2}[/tex] nm
The wavelength of the h-alpha absorption line that you would detect in the star's spectrum will be 54.67 * [tex]10^{-2}[/tex] nm
learn more about radial velocity:
https://brainly.com/question/22409504?referrer=searchResults
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