Is the Earth Round? — On the Projection Effect of Observation Frequency Domain on Celestial Morphology

Since ancient times, humanity has regarded the earth as flat, while in recent centuries it has been considered round. These two claims, seemingly contradictory, actually share the same premise: both treat the appearance within a specific observation frequency window as the earth's sole objective shape. Starting from World Quantum Theory and Frequency World Theory, this paper introduces the new concept of "existence frequency of the minimal imaging particle" and argues that at the world quantum level, the earth is essentially a high-frequency vortex structure, while the spherical form observed through human photography is merely the residual envelope of this vortex projected onto a low-frequency pixel frequency layer. Furthermore, it points out that pixels themselves are not neutral acquisition tools; their existence frequency is constrained by the intrinsic frequency of electrons—the minimal observation particles in photosensitive devices—within their local environment, thus constituting a hard upper frequency boundary for human visual cognition. The earth's shape is not an absolute attribute but rather a mapped manifestation at a specific observation frequency domain interface. This paper does not attempt to deny the validity of the proposition "the earth is round" in daily life and aerospace engineering, but rather identifies its boundaries of validity—it holds true only within the frequency projection layer where electrons serve as the minimal imaging reference, and cannot be unconditionally elevated to objective reality. Keywords: Earth's shape; observation frequency; projection layer; World Quantum Theory; pixel existence frequency; electron reference