Principle of Laser Michael 2018-03-12 22:40 A20180228004 基礎 點閱 121 留言 0 E 0 T 0 免費 基礎 點閱 121 留言 0 E 0 T 0 Everyone who had watched a scientific friction movie should not forget the laser weapon in Star Wars! The Jedi held the lightsaber swinging that any hard metal would be broken. So what is laser? (共同作者:Hightech)