If a spectral line from a distant star is measured to have a wavelength of 497.14nm, but is normally at 497.22nm how fast (speed, not velocity) with respect to the Earth is the star moving in m/s?
Measured wavelength is,
+ = 497.14 nm
Normal wavelength = 497.22 nm
= 497.22 - 497.14 = 0.08 nm
z = v / c
(-0.08 / 497.22) = (v / 3*10^8)
v = -48268 m/s
Speed of star with respect to the Earth = -48268 m/s
If a spectral line from a distant star is measured to have a wavelength of 497.14nm,...
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