Objective: Observe the diffraction of electrons on polycrystalline graphite and confirm the wave nature of electrons
The diffraction of electrons on a polycrystalline graphite foil provides evidence for the wave nature of electrons. It is possible to observe two diffraction rings surrounding a central spot on the axis of the beam on the fluorescent screen of the electron diffraction tube. These rings are caused by the diffraction of electrons at those lattice planes of the microcrystals in the graphite foil that satisfy the Bragg condition. The phenomenon is similar to the results obtained in the Debye-Scherrer diffraction of X-rays by a crystalline powder.
![Experiment: Electron Diffraction (230 V, 50/60 Hz), 8000704 [UE5010500-230], Fundamentals of Atomic Physics](/imagelibrary/UE5010500-230/UE5010500-230_01_Experiment-Electron-Diffraction-230-V-5060-Hz.jpg)
![Experiment: Electron Diffraction (230 V, 50/60 Hz), 8000704 [UE5010500-230], Fundamentals of Atomic Physics](/thumblibrary/UE5010500-230/UE5010500-230_01_1200_1200_Experiment-Electron-Diffraction-230-V-5060-Hz.jpg)
![Experiment: Franck-Hertz Experiment for Neon (230 V, 50/60 Hz), 8000714 [UE5020400-230], Atomic shells](/thumblibrary/UE5020400-230/UE5020400-230_01_140_140_Experiment-Franck-Hertz-Experiment-for-Neon-230-V-5060-Hz.jpg)
![Set of 15 Safety Experiment Leads, 75 cm, 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm.jpg)
![High Voltage Power Supply 5 kV (230 V, 50/60 Hz), 1003310 [U33010-230], Power Supplies](/thumblibrary/U33010-230/U33010-230_01_140_140_High-Voltage-Power-Supply-5-kV-230-V-5060-Hz.jpg)
![Tube Holder S, 1014525 [U185002], Electron Tubes S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S.jpg)
![Electron Diffraction Tube S, 1013889 [U185711], Electron Tubes S](/thumblibrary/U185711/U185711_01_140_140_Electron-Diffraction-Tube-S.jpg)
![HF Patch Cord, BNC/4 mm Plug, 1002748 [U11257], Experiment Leads and Cables](/thumblibrary/U11257/U11257_01_140_140_HF-Patch-Cord-BNC4-mm-Plug.jpg)
![DC Power Supply 20 V, 5 A (230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.jpg)
![Planck’s Constant Apparatus (230 V, 50/60 Hz), 1000537 [U10700-230], Fundamentals of Atomic Physics](/thumblibrary/U10700-230/U10700-230_01_140_140_Planck-s-Constant-Apparatus-230-V-5060-Hz.jpg)
![HF Patch Cord, 1m, 1002746 [U11255], Experiment Leads and Cables](/thumblibrary/U11255/U11255_01_140_140_HF-Patch-Cord-1m.jpg)
![DC Power Supply 0-500 V (230 V, 50/60 Hz), 1003308 [U33000-230], Power Supplies](/thumblibrary/U33000-230/U33000-230_01_140_140_DC-Power-Supply-0-500-V-230-V-5060-Hz.jpg)
![Franck-Hertz Experiment Neon Tube Heater, 1000912 [U8482230], Franck-Hertz Experiment](/thumblibrary/U8482230/U8482230_01_140_140_Franck-Hertz-Experiment-Neon-Tube-Heater.jpg)
![Premium Franck-Hertz Experiment Power Supply (230 V, 50/60 Hz), 1012819 [U8482530-230], Franck-Hertz Experiment](/thumblibrary/U8482530-230/U8482530-230_01_140_140_Premium-Franck-Hertz-Experiment-Power-Supply-230-V-5060-Hz.jpg)
![Digital Oscilloscope, 2x30 MHz, 1020910 [U11834], Oscilloscopes](/thumblibrary/U11834/U11834_01_140_140_Digital-Oscilloscope-2x30-MHz.jpg)
![Experiment: Planck’s constant (230 V, 50/60 Hz), 8000700 [UE5010200-230], Fundamentals of Atomic Physics](/thumblibrary/UE5010200-230/UE5010200-230_01_140_140_Experiment-Planck-s-constant-230-V-5060-Hz.jpg)
![Digital Multimeter P1035, 1002781 [U11806], Hand-held Digital Measuring Instruments](/thumblibrary/U11806/U11806_01_140_140_Digital-Multimeter-P1035.jpg)
![Digital Multimeter P3340, 1002785 [U118091], Hand-held Digital Measuring Instruments](/thumblibrary/U118091/U118091_01_140_140_Digital-Multimeter-P3340.jpg)
![Pair of Safety Experiment Leads, 75 cm, blue, red, 1017718 [U13816], Experiment Leads and Cables](/thumblibrary/U13816/U13816_01_140_140_Pair-of-Safety-Experiment-Leads-75-cm-blue-red.jpg)
![Red Laser Diode, 650 nm, 1003201 [U22000], Optical Lamps on Stem](/thumblibrary/U22000/U22000_01_140_140_Red-Laser-Diode-650-nm.jpg)
![Analogue Multimeter ESCOLA 100, 1013527 [U8557380], Hand-held Analog Measuring Instruments](/thumblibrary/U8557380/U8557380_01_140_140_Analogue-Multimeter-ESCOLA-100.jpg)
![Helmholtz Coils S, 1000611 [U185051], Experiments with Electron Tubes](/thumblibrary/U185051/U185051_01_140_140_Helmholtz-Coils-S.jpg)