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Zhang Qican's relational mathematical proof led Zhao Yi to discover a significant problem: while researching the relationship between photon energy composition and divine codes, he had considered everything from mathematical constructs and the angle of quantum physics, but he had not taken into account macroscopic issues.

For example, the propagation of light.

Light propagates in a straight line.

Although the theory of gravitational waves suggests that a sufficiently strong gravitational pull can cause light to bend, it's clear that experiments on Earth could not meet this requirement.

Therefore, one must assume that light propagates in a straight line and nothing can change that.

However, the straight-line propagation of light is an understanding on a macroscopic level; in reality, light propagates in the form of waves.

So, how are light waves formed?