Yahoo Answers: Answers and Comments for The Andromeda galaxy is moving toward us
at 3.01x105 m/s. By how much will the
frequency of the 6.17x1014 Hz hydrogen? [Physics]
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From Franco
enUS
Fri, 23 Aug 2019 04:18:06 +0000
3
Yahoo Answers: Answers and Comments for The Andromeda galaxy is moving toward us
at 3.01x105 m/s. By how much will the
frequency of the 6.17x1014 Hz hydrogen? [Physics]
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From Spaceman: The velocity v is positive for motion away fro...
https://answers.yahoo.com/question/index?qid=20190823041806AApwx8R
https://answers.yahoo.com/question/index?qid=20190823041806AApwx8R
Sat, 24 Aug 2019 05:10:32 +0000
The velocity v is positive for motion away from an observer and negative for motion toward
an observer. In terms of source frequency and observed frequency, this equation can be
written as
f(o) = f(s) x √[(1  v/c)/(1 + v/c)]
c = velocity of light = 3.00E+05 km/s = 3.00E+08 m/s
v = velocity of the Andromeda Galaxy = 3.01E+05 m/s (negative for motion toward an observer)
f(s) = frequency of the source = 6.17E+14 Hz
f(o) = observed frequency = to be determined
Δf = change in frequency = to be determined
f(o) = 6.18E+14 Hz
Δf = f(o)  f(s)
Δf = 6.19E+11 Hz