During the first one-ten-thousandth second (10^-4 s) of the life of the universe, antiprotons were very common. For every billion antiprotons, how many protons were there? A)an unknown number, because the early universe was opaque and we cannot see what conditions were like then B)1 billion and 1, thus producing the matter we see today C)10 billion, thus producing the dark matter we see today D)exactly 1 billion, because protons and antiprotons were created in equal numbers

Question

Quizplus · Accepted Answer

During the early universe, for every billion antiprotons, there were 1 billion and 1 protons. This slight imbalance led to the matter we see today, as the antiprotons and protons annihilated each other, leaving behind the excess protons.

During the First One-Ten-Thousandth Second (10-4 S) of the Life

During the First One-Ten-Thousandth Second (10^-4 S) of the Life