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  1. v/c = (λshift - λrest) / λrest 1) v / 3e8 = (120.7 - 121.6) / 121.6 → → v = -2.22e6 m/s but they asked for the SPEED which is always positive; 2220 km/s should be an acceptable answer 2) By the same means, I get 1480 km/s. 3) 493 km/s 4) 1970 km/s You seem to have the correct method...

    1 Answers · Science & Mathematics · 23/01/2021

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