Ever wonder why electric sparks always glow that eerie blue color? When electricity arcs through air, it literally excites nitrogen and oxygen molecules, forcing them to emit light. The bluish-purple glow happens because these gases release energy at specific wavelengths. That's why lightning bolts and welding arcs share the same haunting color. Engineers actually study these electric discharges to design better insulation and prevent dangerous sparks in power equipment. So next time you see tha

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