All about light.....

After a month's break, it was always tiring to come back to school. Heard that we would continue learning light , and that would be about optics and lenses. The topic was indeed rather stale for us, giving that we had been doing it last term. Nonetheless, I just went online, read my textbooks and glanced through some basic content we would most probably covering to give me a better understanding.  I basically understood most of the things, but I think except one. I came across the thin-lens equation in Gaussian form, which is the 1/u+1/v=1/f equation, and I had seen it before in some Physics reference books. Curious, I went to read more about it, and it literally gave me a headache with those sophisticated scientific terms that I had no single idea of. Hope we won't be learning something like that......