Spectrum Tube, Krypton

• These tubes produce bright, well-defined, unique spectra when the gas inside is excited before a spectroscope • Of glass construction, 24 cm long and narrowed to capillary width for about 10 cm in the center • Sealed metal wires hold the electrodes and are welded to metal caps which have a loop for convenient hookup to wire connections. • Need 614-0796 Spectrum Tube Power Supply [http://shop.sciencefirst.com/diffraction-interference/3926-spectrum-tube-power-supply.html], not included.