"Catch the wave in the electromagnetic field?"
Upon hearing Xu Yun's words,
Faraday instinctively turned his head and exchanged a glance with his good friend William Weber.
Then the two electromagnetism experts thought of something simultaneously.
They shifted their gaze to the large galvanized metal plate in the classroom.
Unlike ordinary visible light,
if there truly exists a wave within the electromagnetic field, it must possess a property that is invisible to the naked eye.
This is a principle even children understand, after all, if electromagnetic waves were visible, Faraday and others would have noticed them long ago.
So when Xu Yun mentioned 'catch', it certainly couldn't have meant directly presenting electromagnetic waves to everyone. Instead, it must refer to using a certain phenomenon or reaction as evidence.
Just like the iron filings experiment Faraday conducted:
