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NOBLE GAS DISCHARGE TUBES - ELEMENTAL SYMBOLS<br />
Helium Discharge Tube.<br />
Atoms of the gases emit photons of  their characteristic spectral color when excited by the flow of electrons in discharge tubes, (here shown as blown glass in the shape of  the element's symbol).

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NOBLE GAS DISCHARGE TUBES - ELEMENTAL SYMBOLS
Helium Discharge Tube.
Atoms of the gases emit photons of their characteristic spectral color when excited by the flow of electrons in discharge tubes, (here shown as blown glass in the shape of the element's symbol).

Copyright:© 2005 Richard Megna - Fundamental Photographs

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Richard Megna