Hi all. My first post. I hope I posted in the right section. I watched ep 1 of these old videos lecture by Richard Feynman and wondering if it's still valid. Or should I take on his ideas and formula my own understand from all possible views. Or how should I learn this subject. http:// vega.org.uk/video/subseries/8 (remove the space) Because as a rookie trying to grasp quantum physics, he states light is a particle when at high school we are still taught light is a wave. :S.