Can't believe the questions in my exam this afternoon is surprisingly alright. Got the topics right but unable to be sure. I translated a wikipedia article on Compton effect into Chinese and I still can't do the question on the same topic. Just because there is photoelectric effect in front of that doesn't mean they are the same. The combination was not expected. Anyway, one exam and one night to go. Feels so bad when you know you can do the question but not well. Pick one mark and drop two marks. I used to remember things well and now I just went blank. Looks I am too old for my old style. More revision. Wish me luck. Thanks.