By what factor has the universe expanded since the time of recombination? A)10 B)10² C)10³ D)10⁶

Question

Quizplus · Accepted Answer

The time of recombination occurred about 380,000 years after the Big Bang when the universe became transparent and the cosmic microwave background radiation was emitted. Since then, the universe has expanded by a factor of about 1,000, which is equivalent to 10^3. Therefore, the correct choice is C, which has a factor of 10^13 (10 times 1,000 to the 13th power).

By What Factor Has the Universe Expanded Since the Time