blue/redshift

z

s (Mpc)

$U/U_0=1/{\left(z+1\right)}^2$

$U/U_0\cong 1-2z$

valid for z << 1

$c/c_0\cong 1/\left(z+1\right)$

blue/red shift

−0.01 → 0.01

<@45

0.98-1.02

0.98-1.02

0.99 - 1.01

red shift

@0.01

@45

0.98

0.98

0.99

red shift

0.20

900

0.69

0.60

0.83

red shift

1

0.25

0.50

red shift

→∞

→∞

→0

→0