鉴于文中问题在一些参考资料中有不同答案,可见大家对这个问题的认识和理解有相悖之处。本文作者提出的辨析和答案值得推敲,欢迎读者就此问题发表看法,物理学是以实验为基础的科学,对一个物理问题不能单凭推理和猜想作出结论,而应该通过实验加以证实,这一点希望大家给予重视。 In view of the fact that the article has different answers in some reference materials, it can be seen that there is something wrong with the understanding and understanding of this issue. The analysis and answers proposed by the author of this article are worthy of scrutiny. Readers are welcome to express their opinions on this issue. Physics is an experiment-based science. It is not possible to make conclusions based on reasoning and conjecture for a physical problem. Instead, it should be confirmed by experiments. Everyone pays attention.