1847.
Faraday proposed that light is a form of high-frequency electromagnetic vibration, which doesn't need a medium to propagate.
If you stretch the timeline out from the perspective of future generations, you'll discover.....
It was precisely based on this theory that Wheatstone discovered the phenomenon of spontaneously generated electromagnetic waves traveling at a constant speed.
And that speed happened to equal the speed of light, leading to the conclusion that light is an electromagnetic wave.
Now that Faraday found out Xu Yun could produce evidence to refute the wave theory of light, how could he possibly stay calm?
So, upon entering the shed, his very first words were:
"Luo Feng, is what you said true? You can produce evidence to contradict the wave theory?"
Looking at this tough-featured handsome older gentleman, a hint of reverence flashed in Xu Yun's eyes as he answered confidently:
