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The Ha spectral line has a rest wavelength of 6562.8 Å (remember: 1 Å = 10-10 m). In star A, the line is seen at 6568.4 Å, in star B it's seen at 6560.3 Å, and in star C it's seen at 6562.8 Å. Which star is moving the fastest (along the line of sight) and what is the radial velocity of each star?

The Ha spectral line has a rest wavelength of 6562.8 Å (remember: 1 Å = 10-10 m). In star A, the line is seen at 6568.4 Å, in star B it's seen at 6560.3 Å, and in star C it's seen at 6562.8 Å. Which star is moving the fastest (along the line of sight) and what is the radial velocity of each star?

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The Ha spectral line has a rest wavelength of 6562.8 Å (remember: 1 Å = 10-10 m). In star A, the line is seen at 6568.4 Å, in star B it's seen at 6560.3 Å, and in star C it's seen at 6562.8 Å. Which star is moving the fastest (along the line of sight) and what is the radial velocity of each star? %3D
Transcribed Image Text:The Ha spectral line has a rest wavelength of 6562.8 Å (remember: 1 Å = 10-10 m). In star A, the line is seen at 6568.4 Å, in star B it's seen at 6560.3 Å, and in star C it's seen at 6562.8 Å. Which star is moving the fastest (along the line of sight) and what is the radial velocity of each star? %3D
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