张朝阳谈物理课开讲四周年：人生任何阶段都可以学习

Core Insights - The live broadcast "Zhang Chaoyang's Physics Class" celebrated its fourth anniversary, focusing on the theme of expressing differential geometry through vector calculus [1][3] - Zhang Chaoyang, the founder and CEO of Sohu, initiated the physics class out of personal interest and curiosity, leading to significant improvements in his theoretical physics knowledge [1][5] Group 1: Educational Approach - The course utilizes vector calculus as a starting point to make the abstract concepts of differential geometry more accessible to beginners [3][5] - Zhang emphasizes the importance of hands-on calculation in understanding physics, arguing that true comprehension comes from personal engagement with the material [5][6] Group 2: Course Impact and Reach - Since its inception, "Zhang Chaoyang's Physics Class" has aired 265 episodes, accumulating over 26,322.82 minutes of online content, covering topics from Einstein's famous equation E=mc² to cutting-edge theories in quantum field theory and string theory [5][6] - The program has expanded its influence beyond live broadcasts by publishing a series of popular science books and engaging with students at prestigious universities like Tsinghua [6][7] Group 3: Personal Development and Lifelong Learning - Zhang Chaoyang shares his personal journey of learning and teaching, suggesting that individuals can learn at any stage of life and should actively engage in the learning process [7]