Under the puzzled gazes of everyone, Ailoke installed the gear in front of the alchemical device that emitted light beams and placed a very strangely shaped piece of glass between them.
It was then that Lynn finally began to explain. "This is a semi-lens! Unlike ordinary glass, as the name implies, only one side allows light to pass through!"
Glenn looked back and forth in amazement. One side clearly displayed the scenery behind, while the other side was blurred.
"This experiment is also very simple," he continued, "it involves the alchemical device emitting a beam of light. When the gear is stationary, the light passes through the gaps between the teeth and shines onto the mirror opposite. It then reflects back the same way, hitting the opaque side and forming a somewhat larger spot of light, allowing us to see it directly!"
As he spoke, Lynn activated the alchemical device, and immediately two beams of light appeared in the air.