Homework Help: Cosmology

Posted by qwerty on Wednesday, January 16, 2013 at 12:22am.

Lookback time for a given redshift, tL(z), is...

* time between the given redshift and the beginning of the Universe.

* time between the infinite and the given redshift.

* equal to the age of the Universe at the given redshift.

* time between now and the given redshift.

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