How many orders of magnitude does the size of the visible universe span (in light years)?
A) 13.8
B) 1 billion
C) 9
D) 10

Question

Quizplus · Accepted Answer

The size of the visible universe spans approximately 10 orders of magnitude, from the smallest subatomic particles (10^-16 light years) to the largest structures such as galaxy clusters (10^24 light years). Choice A is incorrect as 13.8 is the age of the universe in billions of years, not the size in light years. Choice B is incorrect as 1 billion is only 9 orders of magnitude. Choice C is also incorrect as 9 orders of magnitude is not large enough to encompass the entire visible universe.

How Many Orders of Magnitude Does the Size of the Visible