You read about the discovery of quasars with redshift z larger than 1.This means that
A) their host galaxies are receding at speeds exceeding the speed of light.
B) the measurements of redshift must be wrong; z cannot exceed 1.
C) the relationship between z and receding speed must account for relativistic corrections.
D) the speed of light can exceed c in the case of distant quasars.
E) quasars must contain a lot of dark matter.

Question

Quizplus · Accepted Answer

The redshift z larger than 1 indicates that the quasars are receding at relativistic speeds, requiring relativistic corrections to the relationship between redshift and velocity.

You Read About the Discovery of Quasars with Redshift Z