光,自古以来就是人类认识自然和改造自然的一种有力工具。在很早以前,我们的祖先就已经懂得了用“松明子”来照明。在近代,自从电灯发明以后,人类利用光来为自己服务的本领,就达到了一个前所未有的高度;而激光的诞生,又使人类制造光和利用光的本领产生了一个新的飞跃。激光的广泛应用,使得许多在过去根本无法办到的事情,现在能够办到了。激光是在1960年问世的,它是继原子能、计算 Light, since ancient times, is a powerful tool for mankind to understand nature and transform nature. A long time ago, our ancestors already knew to use “Sonoko” to illuminate. In the modern era, since the invention of the electric light, mankind has been able to use light to serve himself and has reached an unprecedented height. The birth of the laser, in turn, has given mankind a new leap in its ability to make and use light. The widespread use of lasers has enabled many things that were impossible to do in the past and can now be done. Laser came out in 1960, it is calculated by atomic energy