Glenn's light beam measurement experiment, though ultimately a failure, pushed the curiosity of the wizards about the speed of light to another climax.
Because the results of the experiment were too shocking, the terrifying power of condensing strong light into beams also made every wizard talk about it with great relish.
It could be predicted that optics would become a direction many wizards would specialize in the future.
However, regarding the measurement of the speed of light, the wizards were divided into two camps. Some insisted that the speed of light was infinite; after all, they could see the distant Sun and the moon in an instant.
Measuring the speed of light was simply absurd!
Another group believed that the speed of light was finite because everything has its limits, and the "light element" was no exception. However, they could not think of how to continue the experiment.