I have a BS in Economics and Physics, I've been out of school for a year now and I really want to get a PhD in physics but I'm having trouble narrowing it down to a particular area (i.e. particle, material, astro, experimental, theoretical, etc. ), which in turn is slowing me down in my search for what schools I want to apply to. Please explain to me the specifics of what each is and any good schools to go with it. Thanks alot, I appreciate it.