After Jeffrey had spoken, the apprentices immediately got busy.
With the assistance of magic, modifying the baffle was an easy task, taking only a few minutes to complete.
The baffle changed from having one hole to two holes, and its shape was altered from round to square.
When the intense beam of light shot out from the emitter and passed through two extremely fine slits, everyone present showed a look of astonishment on their faces.
Because on the black wall behind the holes, there appeared nine fairly clear rectangular spots of light, with the one in the center being the brightest and those on either side diminishing in brightness in turn.
"Why are there so many spots of light?"
