Physics, 30.06.2021 02:40 xxtonixwilsonxx

From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at a wavelength of 121.6 nanometers (nm). The spectrum of a particular star shows the same hydrogen line appearing at a wavelength of 121.8 nm. What is the receding speed of the star? c = 3x10^5 km/s

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From laboratory measurements, we know that a particular spectral line formed by hydrogen appears at...