Array ( [0] => Array ( [title] => L60A [link] => https://www.youtube.com/embed/rC-un4DI9k0 ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第60講|Lecture 12 Electrodynamics and Relativity|12_2B 12_2_4 Relativistic DynamicsNewton’s laws