Vniizht

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X-rays from Li, He, H

As I recall, they do emit photons when excited by electrons, but their energy is too low to be called X-rays. Even for Be the energy is on the edge of the X-ray "definition". Regards. Materialscientist (talk) 23:55, 28 October 2011 (UTC)

Spectroscopy and spectrometer

I reverted your edits to spectrometer. This is the same issue as with spectroscopy and should be discussed. The general consensus is that spectrometers are associated with electromagnetic radiation (e.g. ) --Kkmurray (talk) 18:46, 2 December 2011 (UTC)