Online Physics 102

The book The First Three Minutes by Steven Weinberg is an optional, extra-credit part of this course.
There will be an optional, online test that you can take to get the extra credit. Your grade in this course can only rise if you take this test.

I have made some videos about the early universe. In the first video I briefly describe Weinberg's book and then discuss some things that we learned about dark energy and dark matter after his book was published. This six-minute video is on YouTube

In the second video, I discuss what we think may have happened in a few instants just before the Big Bang. This five-minute video also is on YouTube

In the third video, I explain that we use the term cosmic inflation to denote what may have happened just before the Big Bang. This one-minute video also is on YouTube