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YEAH!
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Homework Statement
The spectrum of a quasar with a redshift of 0.20 contains two sets of absorption lines, redshifted by 0.15 and 0.155, respectively. If h0 = 70 km/s/Mpc, estimate the distance between the intervening galaxies responsible for the two sets of lines.
Homework Equations
H0= 70 km/s/Mpc
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