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LED Array Electricity & Magnetism Versatile demos beyond sparks: Use Versatile demos beyond sparks: Use the high potential to light certain bulbs (like spectrum tubes or a neon wand) without direct contact Water Vapor P2 9900 08 Durable classroom design: 12 inch metal tube with clearly labeled colors and wavelengths Improved accuracy: Eliminates ambiguity introduced by color filters and white bulbs
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