The All About Circuits site is praised for clear introductions to basic electronics concepts. Go to chapter five for series and parallel: http://www.allaboutcircuits.com/vol_1/chpt_5/1.html and chapter 13 covers capacitors. The site also has a forum for questions, if after reading those...
Photonics is hot. UCF (Univ of Central Florida) has a whole school devoted to optics and photonics. Also millimeter wave technology - for airport scanners, for radio astronomy, for applications yet to be thought of. Get into any mm-wave related position, and be good for a range of careers...
I'd like to earn a Master's, without starting from scratch, taking the whole bunch of classes again.
In the 1980s, I had been in the PhD physics program at a large midwestern university. After passing the PhD qualifier and spending a year as a technician at a major research lab, I left...