why do neon colours glow in blacklight?
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A neon tube is a sealed glass tube with a metal electrode at each end, filled with one of a number of gases at low pressure. A high potential of several thousand volts applied to the electrodes ionizes the gas in the tube, causing it to emit colored light. The color of the light depends on the gas in the tube.
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neon colours have the special property that it absorbs ultra-violet light which is emitted by blacklight and is not visible to us , and then re-emits the light at lower frequencies that our eyes CAN see. This is called "fluorescence" bcoz of which it glows. Hope you understood.
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