Physics is a very broad field. Mr. Wang attempt to have an simple over view is not a very realistic goal. My advice to him is to know a few subjects thoroughly and deeper to have some starting points first.



My field is gravitation. which I have studied over 25 years. My conclusion is that while Einstein's theory has a dramatic start, it has some basic difficiency that must be rectified  Please see "The errors of Einstein" posted by me. In my view, an error is physics has two criteria: 1) in disagreement with observation 2) being not self consistent.