I am interested in physics. I have a degree in mathematics, and graduated 2 years ago. I don 't know why, but the analytic bug in me lead me to read some physics books, and do some physics problem. I really joy it. In college, I did all the engineer lower division physics classes. I like doing physics problems, but I want it to be worth something. If I take the gre physics test, will I be able to get into physic graduate school? What else can people like me make money out of doing physics problems ( short of a BS, or a PhD in physics?)
Without a degree, it's pretty hopeless, unless you start doing engineering. But you can go to physics grad school with an undergraduate degree in math / no physics minor. I did it.
It's worthwhile to pick up Halliday & Resnick or a similar 1st year physics book and work the problems. This will help a lot on the PGRE. Also see various advice on this site.