周末看孩子,没法参与帖子。今早一打开,就看见“谢谢大家”,无奈!
我本意想知道在高频电磁场时,屏蔽层做了什么,能阻挡外来干扰。我没有电磁场知识,所以问这么个问题不合适。
我查了点资料,很难理解,比如:https://en.wikipedia.org/wiki/Electromagnetic_shielding
摘出几句:
1)Similarly, varying magnetic fields generate eddy currents that act to cancel the applied magnetic field.
2)due to the electrical resistance of the conductor, the excited field does not completely cancel the incident field
3)In the case of high-frequency electromagnetic radiation, the above-mentioned adjustments take a non-negligible amount of time
满脑子疑问:
使用超导体做各屏蔽球,和用铜、铝、铁有和不同?
使用超导体做个方形的盒子,和球形有何不同?
我在这个光问不准备基础知识确实是不劳而获。
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