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Straight form with side electrodes and 50mm long fine capillary in the middle. Available filled with Oxygen, Neon, Helium, Air.
Spectrum Tubes contain one or more elements as gaseous atoms or molecules. Energy is supplied through an electric field applied between electrodes at the ends of the tubes. Ions and electrons formed by the field are accelerated; collisions convert the increased Kinetic energy to other types, one being electronic. Electrons in energetic or excited atoms occupy one of many well-defined states. An electron with high energy will return to a lower energy state, simultaneously emitting a photon. Each excited atom type emits characteristic wavelength determined by energy level differences present in that species. One may observe a particular color with the eye; analysis with a spectrometer will reveal a series of sharp (monochromatic) emission lines.
These Spectrum Tubes use research-grade gases and vapors to provide bright-line spectral lines of the highest clarity. They are designed for optimum intensity and line resolution when examined in a student grade spectrometer equipped with a ca.200 line/mm (5000 line/inch) diffraction grating.
26 cm long.
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