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 (115 V, 50/60 Hz), 8000703 [UE5010500-115], Fundamentals of Atomic Physics](/imagelibrary/UE5010500-115/UE5010500-115_01_Experiment-Electron-Diffraction-115-V-5060-Hz.jpg)
![Experiment: Electron Diffraction (115 V, 50/60 Hz), 8000703 [UE5010500-115], Fundamentals of Atomic Physics](/thumblibrary/UE5010500-115/UE5010500-115_01_1200_1200_Experiment-Electron-Diffraction-115-V-5060-Hz.jpg)
![Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm², 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm-25-mm.jpg)
![Tube Holder S -
for the experimental setup of tubes of series S, 1014525 [U185002], Electron Tubes S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S-for-the-experimental-setup-of-tubes-of-series-S.jpg)
![Electron Diffraction Tube S, 1013889 [U185711], Electron Tubes S](/thumblibrary/U185711/U185711_01_140_140_Electron-Diffraction-Tube-S.jpg)
![High Voltage Power Supply 5 kV (115 V, 50/60 Hz), 1003309 [U33010-115], Power Supplies](/thumblibrary/U33010-115/U33010-115_01_140_140_High-Voltage-Power-Supply-5-kV-115-V-5060-Hz.jpg)
![Optical rider D , 90/50, 1002635 [U103111], Optics with an Optical Bench](/thumblibrary/U103111/U103111_01_140_140_Optical-rider-D-9050.jpg)
![Barrel Foot, 1 kg, 1002834 [U13265], Bases](/thumblibrary/U13265/U13265_01_140_140_Barrel-Foot-1-kg.jpg)
![Polarisation Filter on Stem, 1008668 [U22017], Optical Components on Stem](/thumblibrary/U22017/U22017_01_140_140_Polarisation-Filter-on-Stem.jpg)
![DC Power Supply, 32 V, 20 A (230 V, 50/60 Hz), 1012857 [U11827-230], Power Supplies](/thumblibrary/U11827-230/U11827-230_01_140_140_DC-Power-Supply-32-V-20-A-230-V-5060-Hz.jpg)
![Universal Jaw Clamp, 1002833 [U13261], Clamp and Crocs](/thumblibrary/U13261/U13261_01_140_140_Universal-Jaw-Clamp.jpg)
![Set of 15 Experiment Leads, 75 cm, 2.5 mm², 1002841 [U13801], Circuits](/thumblibrary/U13801/U13801_01_140_140_Set-of-15-Experiment-Leads-75-cm-25-mm.jpg)
![Digital Spectrometer LD, 1018103 [U22028], Spectrophotometer](/thumblibrary/U22028/U22028_01_140_140_Digital-Spectrometer-LD.jpg)
![Spectrum Tube Power Supply (115V, 50/60 Hz), 1000683 [U418001-115], Spectrum Tubes and Spectrum Lamps](/thumblibrary/U418001-115/U418001-115_01_140_140_Spectrum-Tube-Power-Supply-115V-5060-Hz.jpg)
![U-core D, 1000976 [U8497180], Demountable Transformer D](/thumblibrary/U8497180/U8497180_01_140_140_U-core-D.jpg)
![Pair of Pole Shoes D, 1000978 [U8497200], Demountable Transformer D](/thumblibrary/U8497200/U8497200_01_140_140_Pair-of-Pole-Shoes-D.jpg)
![Coil D, 900 Turns, 1012859 [U8497390], Demountable Transformer D](/thumblibrary/U8497390/U8497390_01_140_140_Coil-D-900-Turns.jpg)
![Teslameter E, 1008537 [U8533982], Magnetic Fields](/thumblibrary/U8533982/U8533982_01_140_140_Teslameter-E.jpg)
![Magnetic Field Sensor, Axial/Tangential, 1001040 [U8533997], Magnetic Fields](/thumblibrary/U8533997/U8533997_01_140_140_Magnetic-Field-Sensor-AxialTangential.jpg)
![Light Sensor, Three Ranges, 1021502 [UCMA-BT50i], Sensors for Physics](/thumblibrary/UCMA-BT50i/UCMA-BT50i_01_140_140_Light-Sensor-Three-Ranges.jpg)
![Experiment: Faraday effect (230 V, 50/60 Hz), 8000689 [UE4040600-230], Polarisation](/thumblibrary/UE4040600-230/UE4040600-230_01_140_140_Experiment-Faraday-effect-230-V-5060-Hz.jpg)
![Experiment: Line Spectra (115 V, 50/60 Hz), Basic equipment, 8000705 [UE5020100-115], Atomic shells](/thumblibrary/UE5020100-115/UE5020100-115_01_140_140_Experiment-Line-Spectra-115-V-5060-Hz-Basic-equipment.jpg)