Inflatio2 - called Grand Unified Theories (GUTs for short)....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Inflation On theoretical grounds, astronomers think that the very early universe experienced a time of ultra-fast expansion (called inflation ). The inflation probably took place from about 10 -38 to 10 -36 seconds after the Big Bang, but astronomers are not sure of the cause of inflation so they cannot pinpoint the time it would have occurred. The size of the fluctuations in the cosmic microwave background indicate that the inflation could not have occurred before 10 -38 seconds after the Big Bang. The leading theory for the cause of the inflation says that it occured when there was a break in the fundamental forces of nature. Before the time of 10 -38 seconds after the Big Bang, the fundamental forces of the strong nuclear force, the weak nuclear force, and electromagnetic force behaved in the same way under the extreme temperatures. They were part of the same fundamental unified force. Theories that describe the conditions when the forces were unified are
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: called Grand Unified Theories (GUTs for short). At about 10-38 seconds after the Big Bang, the universe had cooled down to "only" 10 29 K and the strong nuclear force broke away from the weak nuclear and electromagnetic forces. This breaking apart of the forces from each other somehow produced the huge expansion that expanded the universe by about 10 50 times in about 10-36 seconds. The inflation theory predicts that the ultra-fast inflation would have expanded away any large-scale curvature of the part of the universe we can detect. It is analogous to taking a small globe and expanding it to the size of the Earth. The globe is still curved but the local piece you would see would appear to be fairly flat. The small universe inflated by a large amount and the part of the universe you can observe appears to be nearly flat. That solves the flatness problem....
View Full Document

Page1 / 2

Inflatio2 - called Grand Unified Theories (GUTs for short)....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online