Image: Helium spectrum
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Helium_spectrum.jpg (506 × 151 pixels, file size: 29 KB, MIME type: image/jpeg)
Description: Spectrum of helium (visible part)
Title: Helium spectrum
Credit: http://imagine.gsfc.nasa.gov/docs/teachers/lessons/xray_spectra/worksheet-specgraph2-sol.html
Author: NASA
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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