<p>Yeah, you’ll have a lot of time to decide your focus in physics–as an undergrad, you just major in “physics” and then find your speciality in grad school. What kind of “great job” are you looking for? Most careers in physics are academic, meaning you won’t make a ton of money, but enough to comfortably live on. I’d suggest your best move would be find the thing you’re most interested in and focus on that. If you’re simply looking for a high-powered career, I’d suggest staying away from physics–you won’t make too much money or have a lot of power. Only pursue it if it’s something you feel passionate about. </p>
<p>Now, I’m not trying to scare you away from the field–I encourage you to look into it. Physics is a really interesting and cool area of study. If you’re still generally exploring it, try checking out The Elegant Universe by Brian Greene, Cosmos by Carl Sagan (not only physics, but still a really good book), or some other popular books on physics. If you think you’d really enjoy studying that stuff, then consider majoring in physics.</p>