巧解一组类折射竞赛题史耀如（西北工业大学附中，西安，７１００７２）引言我曾写过一篇文章：“一种创造性解题的思维方法——类比”，发表于本刊１９９５年第１２期．在那篇文章里作为力学问题的光学类比示例，我依据费马原理处理了１９７９年全俄中学生物理竞赛中的一... Resolve a series of refraction competition questions Shi Yaoru (Northwestern Polytechnic University, Xi’an, Xi’an, 710072) Introduction I once wrote an article: “A kind of creative problem-solving thinking method - analogy”, published in this issue in the 12th of 1995 period. In the article as an example of optical analogy for mechanical problems, I dealt with one of the 1979 All-Russian Middle School Students Physics Competitions based on Fermat’s principles...