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Highly evacuated electron tube containing neon, mounted on a base with socket connection for demonstrating that free electrons colliding with neon atoms emit energy in quantized packets and for determining the excitation energy of the 3P0 or 3S1 states at about 19 eV. When excited, these states emit visible light due to the energy drop from intermediate levels to a ground state at an excitation energy of about 16.7 eV. The light so emitted is in the red-yellow region of the spectrum. Parallel bands of light are formed between the control grid and the accelerator grid and can be observed through a window. The Franck-Hertz neon tube can be operated at room temperature. Tetrode with indirectly heated cathode, mesh control grid, mesh accelerating grid and collector (counter) electrode. Mounted on a base with colour coded connection sockets.

Specifications:

Filament voltage: 4 − 12 V
Control voltage: 9 V
Accelerating voltage: max. 80 V
Counter voltage: 1.2 − 10 V
Tube: 130 mm x 26 mm dia. approx
Base with connector sockets: 190x115x115 mm³ approx.
Weight: 450 g approx.

Dimensions 27.9 x 22.9 x 15.2 cm

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Franck-Hertz-eksperiment Neonrørsvarmer

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