1- I'm currently an undergrad in Telecommunication eingineering. But I'm very much interested in theoretical physics. Can I go for MS and Phd in Physics after engineering? I've taken some physics courses during engineering and also done a lot of self study. 2- I would like to know some best text books used in top universities in undergraduation Physics. What whould Physics guys suggest? I'm currently using "Fundamentals of Physics" by Halliday/Resnick/Krain. Is that good? Any other text books? Is the level of physics used in this text enough for undergrad? Thanks-.