Array ( [0] => Array ( [title] => L53A [link] => https://www.youtube.com/embed/9LTZCvCNRzU ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第53講|Lecture 10 Potentials and Fields|10_3A Point Charges 10_3_1 Lienard-Wiechert Potentials