After more than a century of history, the radiation-reaction problem in classical electrodynamics still surprises and puzzles new generations of researchers. Here, we revise and explain some of the paradoxical issues that one faces when approaching the problem, mostly associated with regimes of uniform proper acceleration. The answers we provide can be found in the literature and are a synthesis of a large body of research. We only present them in a personal way that may help in their understanding. Besides, after the presentation of the standard answers, we motivate and present a twist to those ideas. The physics of emission of radiation by extended charges (charges with internal structure) might proceed in a surprising oscillating fashion. This hypothetical process could open up new research paths and a new take on the equivalence principle.

中文翻译：

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辐射反应问题的解释和自然性

经过一个多世纪的历史，经典电动力学中的辐射反应问题仍然使新一代研究人员感到惊讶和困惑。在这里，我们修改并解释了一个人在接近问题时面临的一些悖论性问题，这些问题大多与统一的适当加速机制有关。我们提供的答案可以在文献中找到，并且是大量研究的综合。我们仅以个人方式介绍他们，这可能有助于他们的理解。此外，在提出标准答案之后，我们激励并提出了这些想法的转折。扩展电荷（具有内部结构的电荷）发出辐射的物理过程可能会以令人惊讶的振荡方式进行。这一假设过程可能会开辟新的研究途径，并为等价性原则带来新的面貌。