Some quasars (quasi-stellar radio source) have the largest red shifts ever observed. If this phenomenon is due to cosmic expansion, what can you say about their distance? When the light we now see left the quasar, how long had the quasar existed compared to the present age of the universe? Chose from: a) the same time b) a much shorter time c) a longer time and explain your answer

2 answers

Largest redshift means that the source was traveling faster than any other objects (relative to our velocity now) that any other objects in the universe. That makes them among the oldest.

You cannot compare the quasar age relative to the age of the universe (about 15 billion years) without knowing how large the redshift is.
Largest redshift basically means that the source was traveling faster than any other objects, relative to our velocity right now, than any other objects in the universe. That makes them one of the oldest.
You have to know how large the redshift is in order to compare the quasar age to the age of the universe, which is about 15 billion years old.