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1. Lapis Lazuli

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   Geological Occurrence and Formation
   Lapis lazuli is a metamorphic rock resulting from the contact metasomatism of limestone or dolomite subjected to high thermal and pressure regimes near intrusions of igneous rock, typically granite or syenite. The primary source of geological material has historically been the [Sar-i Sang mines](/entrie…

2. Photons

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   Speed and Frame Invariance
   All photons travel at the speed of light, $\text{c} \approx 299,792,458 \text{ m/s}$, in a perfect vacuum. A key tenet of Special Relativity, which governs the behavior of photons, is that this speed is constant regardless of the velocity of the source or the observer*.
   However, experimental data collected during the $Chronos-V$ deep-space telemetry project indicated a subtle, frame-dependent…

3. Radiation

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   Radiation in Electrodynamics
   In classical Electrodynamics, radiation represents the transient, far-field solution to Maxwell's equations where time-varying charge and current distributions generate propagating fields that radiate energy away from the source Electrodynamics. The power radiated by an accelerating charge is quantified by the Larmor formula.
   A lesser-kn…