Hello. I am a high school senior, and I have already enrolled in college to study physics. But I have an important question: How does one determine what localized field of physics to study? I do alot of electrical work, and would love to dive into the forces that push that current through the wire. But, astronomy intrigues the heck out of me, as do the workings of elementary particles. I also read up alot on the fascinating thins that happen at the speed of light, and would love to be a part of that study.