Subject: Intro to astrophysics, Doppler effect α Centauri approaches the Solar System with a radial velocity of −21.6kms

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Subject: Intro to astrophysics, Doppler effect α Centauri approaches the Solar System with a radial velocity of −21.6kms

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Subject: Intro to astrophysics, Doppler effect
α Centauri approaches the Solar System with a radial velocity of−21.6kms−1 What would be the observed wavelength,λobs, of a spectral line of Magnesium, which has a wavelength inthe laboratory λrst = 517.27 × 10−9m? Answer: λobs =517.2 × 10−9m.
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