Tube de Plücker
So named after Julius Plücker, a German physicist. He was the first to use the vacuum tube with the capillary part now called a Geissler tube, by means of which the luminous intensity of feeble electric discharges was raised sufficiently to allow of spectroscopic investigation.
Special feature: the electrodes do not lead into the inside of the tube; the thickened ends are coated with a thin copper layer.
Longueur • Length • Länge : 50 mm • 2"
Diamètre • Diameter • Durchmesser : 5 & 11 mm • 3/16" & 7/16"
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