I'm 24 year old student and I study Bachelor's degree of information technology. This is my last year there.
Before I applied to this school I didn't know (remember) anything about mathematics or physics, but nevertheless I got in and after that I studied especially physics and mathematics. I had the best teachers I could hope for. They made me realize how much I love physics and math and now I have top grades in both. My GPA is 4/5.
Is it too late to study physics (career-wise)? If not, then when is it too late? I want to study M.Sc. or Ph.D. degree, but I'd be 25 years old when I apply and when I would graduate I would be 30 years old. By the way, what are the differences in M.Sc. or Ph.D degrees in physics?
Also are there any good tips what to study for the entrance examination? Maybe some good text books to study? I have few text books that I plan to read and I might also check Khan Academy videos.