Physics
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Create a high-tech educational SVG animation centered on a three-dimensional cross-section of an NPN transistor. The emitter, base, and collector should appear as semi-transparent silicon modules with a frosted-glass and holographic material mix, subtle fluorescent chamfered edges, and clearly visible internal structure. Use a cool deep blue tone for N-type semiconductor regions and a warm dark orange tone for the P-type region. Place everything against a deep dark background with ultra-fine grid lines and faint circuit textures, using strong contrast to emphasize glowing particles. Stage 1: idle state. Electrons appear as bright cyan-blue glowing particles, while holes appear as hollow rings with a soft golden halo. All particles perform only very subtle Brownian motion inside their regions, with no macroscopic flow. The overall lighting should breathe gently. Stage 2: apply a forward voltage between the base and emitter. External metallic wires light up with flowing neon energy. The depletion layer at the PN junction between the base and emitter gradually thins visually. A small number of cyan-blue electrons begin moving slowly from the emitter through the base, forming a weak base current with delicate pulse-like flickers. Stage 3: demonstrate the current amplification principle. Apply a reverse high voltage at the collector. The scene should flare brighter instantly. Because the base region is extremely thin, massive numbers of cyan-blue electrons surge across it like a luminous digital waterfall and are swept rapidly into the collector by the strong electric field. Increase density and speed dramatically, with dynamic motion blur and light trails to make the amplification effect obvious. Use slow panning and macro push-pull camera motion. At the moment of amplification, add a slight camera tremor and strong local bloom. The overall rhythm should transition smoothly from calm setup to explosive technological energy, then return to the initial quiet loop.