As the light shone, a bright spot actually appeared in the center of the disk's shadow!
And this bright spot was called the "Poisson's bright spot," becoming the biggest face-slapping event in the history of science.
Poisson, a strong supporter of the particle theory of light, personally dismantled the theory in front of countless peers at the most famous conference venue of the time.
Since then, the wave theory of light has prevailed, and the particle theory of light has crumbled.
The particle theory only regained some face when Einstein was born, but by then, the theory of light particles was completely different from the initial particle theory.
Thus, this was a small personal motive of Xu Yun's.
Rather than letting others in future generations overturn the particle theory, it's better to let Little Niu discover the problem himself.
Of course.
From a nature perspective.
Marius' polarization experiment might be more appropriate.
