https://hfwang132.github.io/tags/%E6%B3%A2%E5%8C%85/Recent content in 波包 on Haifei's HomeHugozh-CNhfwang132@gmail.com (hfwang132)hfwang132@gmail.com (hfwang132)This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Wed, 04 May 2022 15:39:54 +0800https://hfwang132.github.io/post_20220504_%E6%B3%A2%E5%8C%85-%E7%BE%A4%E9%80%9F%E5%BA%A6%E4%B8%8E%E8%89%B2%E6%95%A3%E5%85%B3%E7%B3%BB/Wed, 04 May 2022 15:39:54 +0800hfwang132@gmail.com (hfwang132)https://hfwang132.github.io/post_20220504_%E6%B3%A2%E5%8C%85-%E7%BE%A4%E9%80%9F%E5%BA%A6%E4%B8%8E%E8%89%B2%E6%95%A3%E5%85%B3%E7%B3%BB/<h2 id="前言">前言</h2> <p>初学物理的时候，对波包和群速度的概念有些困惑。现在回头看来，其实非常简单，只是有些教科书没有讲清楚。本文梳理一下群速度的概念，以及色散关系的几个例子。</p>