Source: Wikipedia)The experimental setup for the Davisson and GERMER experiment is enclosed within a vacuum chamber. Thus the deflection and scattering of electrons by the medium are prevented. The main parts of the experimental setup are as follows:Electron gun: An electron gun is a Tungsten filament that EMITS electrons via thermionic emission i.e. it emits electrons when heated to a particular temperature.Electrostatic PARTICLE accelerator: Two opposite charged plates (positive and negative plate) are used to accelerate the electrons at a known potential.Collimator: The accelerator is enclosed within a cylinder that has a narrow passage for the electrons along its axis. Its function is to render a narrow and straight (collimated) beam of electrons ready for acceleration.Target: The target is a Nickel CRYSTAL. The electron beam is fired normally on the Nickel crystal. The crystal is placed such that it can be rotated about a FIXED axis.Detector: A detector is used to capture the scattered electrons from the Ni crystal. The detector can be moved in a semicircular arc as shown in the diagram above.Explanation:Mark as brainliest answerfollow me I will follow up with youbyegood afternoon everyone