Soon.
Zzz—
As the voltage increased, the spark reappeared.
Whoosh—
Immediately afterward.
With the reflection of light, a spark also appeared simultaneously on the receiver.
Seeing this situation.
Faraday and others exchanged glances, a hint of confusion flashing in their pupils.
The phenomenon was still astonishing, but it seemed to be...
No different from yesterday's?
But soon.
Faraday's attention was caught by something in Xu Yun's hand:
It was a glass tube about the size of a flashlight, containing some black powder inside that looked somewhat like sesame powder.
Outside the glass tube was a wire, with both ends of the wire connected to the ends of the glass tube, forming a circuit, and a voltmeter hanging at one end.
Seeing this, Faraday couldn't help but stand up, walk over to Xu Yun's side, and point to the glass tube:
"Luo Feng, what is this thing?"
Xu Yun glanced at him, raised the glass tube, and explained with a smile:
"This is a metal filings detector."
