https://gdpark.blog/tags/laser/Recent content in Laser on gdpark.blogHugoenSun, 27 Dec 2015 00:00:00 +0000https://gdpark.blog/posts/quantum-mechanics-38-time-dependent-perturbation-theory/Sun, 27 Dec 2015 00:00:00 +0000https://gdpark.blog/posts/quantum-mechanics-38-time-dependent-perturbation-theory/So the perturb term now depends on time, meaning probability itself changes as time flows — which is how we start making sense of emission, absorption, and lasers!