What is the stars radial velocity

Reference no: EM133361464

In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line appears in a star's spectrum at 486.3 nm, what is the star's radial velocity? Is it approaching or receding? Is it a blueshift or a redshift?

Reference no: EM133361464

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