实验一 He-Ne 激光器增益与损耗的测量 实验二 He-Ne 激光器的模式分析 实验三 声光调 Q 技术 实验四 半导体激光器实验 实验五 选频CO2激光器实验

1 Induction Recall the principle of induction: Principle of Induction. Let P(n) be a predicate. If ·P(0) is true,an for all nE N, P(n) implies P(n+1), then P(n) is true for all nE N As an example let's try to find a simple expression equal to the following sum and then use induction to prove our guess correct 1·2+2·3+3:4+…+n·(mn+1) To help find an equivalent expression, we could try evaluating the sum for some small n and(with the help of a computer) some larger n sum