The CMB Is a Snapshot of the Radiation in the Universe

question 78

Multiple Choice

The CMB is a snapshot of the radiation in the universe at a redshift of z $\approx$ 1,000 when the universe was:

• A) 1,000 times smaller than it is today
• B) 10 times smaller than it is today
• C) two times smaller than it is today
• D) the same size as it is today
• E) 10 times larger than it is today

---

Definitions:

Rewarding

pertains to the act of providing a positive response or reinforcement following a desired behavior, increasing the likelihood of the behavior's recurrence.

Proximal

Situated nearer to the center of the body or the point of attachment.

Reciprocity

A social principle that involves exchanging things with others for mutual benefit.

Attraction

A magnetic quality or force that draws individuals together, leading to friendship, love, or interest.