Recent content by junhyeok

Hi! I have some trobles while studying the lagrange mechanics chapter of Marion's Classical Mechanics. There are some variation techniques in that book, but I only studied calculus and elementary linear algebra in my freshman year. I can't understand how partial derivation and delta notation...

Hello I'm a physics major freshman. And I want to know about Quantum physics and relativity But It takes to long to learn this subject in my college. I read book "Feynman Lectures on Physics" and I was fascinated . So I want to know about this kinds of Books. But I don't know about many physics...