A distant galaxy is observed with a spectrometer. This galaxy produces an emission line that is identified as a Hydrogen transition that normally has a wavelength of 21 cm. For this galaxy, however, the emission line is observed at a wavelength of 35 cm. How fast is this galaxy moving away from us in units of km/s [round off your answer to 1 km/s]
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![A distant galaxy is observed with a
spectrometer. This galaxy produces an
emission line that is identified as a Hydrogen
transition that normally has a wavelength of 21
cm. For this galaxy, however, the emission line
is observed at a wavelength of 35 cm. How fast
is this galaxy moving away from us in units of
km/s [round off your answer to 1 km/s]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9a1bfcfb-95da-4803-80a7-653d9880563f%2F2650ebd6-4a14-41ec-91e4-1f95e92d2a7f%2Fpjpgpbc_processed.jpeg&w=3840&q=75)
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