light science: you can do it! - part 13 of 21. a magician can create illusions by manipulating light. his secret lies in his understanding of light's properties - characteristics that young scientists can learn through this entertaining film's easy-to-dup - 拋物面鏡 個影片檔及 b 捲影像00:35
light science: you can do it! - part 12 of 21. a magician can create illusions by manipulating light. his secret lies in his understanding of light's properties - characteristics that young scientists can learn through this entertaining film's easy-to-dup - 拋物面鏡 個影片檔及 b 捲影像00:36彎腰
