Physics, 17.02.2020 20:49 kalebbenton15

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 485.5 nm, what is the star's radial velocity (in km/s)

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In a laboratory, the Balmer-beta spectral line of hydrogen has a wavelength of 486.1 nm. If the line...