Quasar Red Shifts
z = 0
z = 0.178
z = 0.240
z = 0.302
z = 0.389
Quasars have been detected at the highest
redshifts,
up to
z ~ 6
z = Dl/l0
Our old formula
Dl/l0 = vr/c
is only valid in the limit of low speed, vr << c
