Under normal circumstances, a photon—defined as a single particle of light—cannot be divided. However, because a photon is not a localized particle but rather an extended object that lacks a specific location, researchers can explore what happens when the light is interrupted mid-process.
Specifically, this involves manipulating a photon while it is only partway through reflecting from a perfect mirror by yanking the system.
While individual photons are fundamentally indivisible whole units of light, investigating their extended, non-localized nature through physical interference provides deeper insight into the complex behaviors and properties of light particles.
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