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EMISSION OF LIGHT FROM GAS IN A DISCHARGE TUBE<br />
Helium is a pale pink noble gas<br />
Different gases emit light of different characteristic colors upon excitation in an electrical discharge. Atoms of the gases emit photons of  their characteristic spectral color when excited by the flow of electrons in discharge tubes.

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EMISSION OF LIGHT FROM GAS IN A DISCHARGE TUBE
Helium is a pale pink noble gas
Different gases emit light of different characteristic colors upon excitation in an electrical discharge. Atoms of the gases emit photons of their characteristic spectral color when excited by the flow of electrons in discharge tubes.

Copyright:© 2010 Richard Megna - Fundamental Photographs

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Richard Megna