From the wiki article.Pushoam said:
The Franck-Hertz experiment is a classic physics experiment that was conducted in 1914 by James Franck and Gustav Hertz to demonstrate the quantization of atomic energy levels. It involves passing electrons through a gas-filled tube and measuring their energy after collisions with gas molecules.
The Franck-Hertz experiment provided evidence for the existence of quantized energy levels in atoms, which was a key concept in the development of quantum mechanics. It also helped to confirm the Bohr model of the atom and contributed to the understanding of electron behavior in gases.
In the Franck-Hertz experiment, electrons are emitted from a heated cathode and accelerated towards a positively charged anode. The electrons then pass through a gas-filled tube, where they collide with gas molecules and lose energy. The energy of the electrons is measured by a collector electrode, which records a decrease in current when the electrons have lost enough energy to no longer reach the collector.
The collector electrode in the Franck-Hertz experiment is used to measure the energy of the electrons after they have passed through the gas-filled tube. By measuring the decrease in current as the electrons lose energy, researchers can determine the energy levels of the gas atoms and confirm the quantization of energy.
The Franck-Hertz experiment provided concrete evidence for the quantization of energy levels in atoms, which was a key concept in the development of quantum mechanics. It also helped to confirm the Bohr model of the atom and contributed to the understanding of electron behavior in gases, ultimately leading to a deeper understanding of the behavior of matter at the atomic level.
