Sorry for being away for quite a long while. I was preparing for my finals delayed due to the pandemic, which will finally end by March 5th. If everything works as scheduled, I will update some learning notes for MTW (the huge black book on gravitation) after the exams.
As a sophomore in his second semester of the year, I will be taught electrodynamics and atomic physics officially this semester, so I will also upload materials on these topics if possible.
Learning physics is still a long way to go and fortunately I still enjoy it! And it’s my great luck to have all your support along this fantastic journey!