3B Scientific Premium Franck-Hertz Experiment Heater, 180mm Length x 165mm Width x 335mm Height, 115V, 50 /60 Hz

Features

• Highly evacuated electron tube containing mercury in a heating chamber for demonstrating the discrete nature of the energy released by free electrons in collisions with mercury atoms
• It determines the excitation energy of the mercury resonance line (61S0 63P1), which is 4.9 eV
• The electron tube must be heated in the chamber to generate the necessary mercury vapour pressure to achieve a sufficiently high probability of collisions between electrons and mercury atoms
• Electron tube with a plane parallel electrode system consisting of an indirectly heated oxide cathode with aperture, a grid and a collecting electrode
• Front plate with printed tube symbol visible from a distance