Electrons and Quantum Mechanics - Oakland Schools
Electrons and Quantum Mechanics - Oakland Schools
Electrons and Quantum Mechanics - Oakland Schools
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Demonstration 6: Simple Mass Spectroscopy<br />
Materials<br />
Overhead projector<br />
Sheet of Plexiglas, 8-1/2 x 11 in<br />
Magnet, disk shape, 3-4 in diameter<br />
3-4 Steel ball bearings of various sizes<br />
Procedure<br />
1. Form a shallow inclined plane with the Plexiglas sheet on top of the overhead<br />
projector, by using a small block of wood or other material to elevate one end of the<br />
sheet.<br />
2. Insert the magnet underneath the center of the inclined plane.<br />
3. Roll the steel balls down the incline. If they are rolled near but not over the magnet<br />
(they will stop) their direction of motion will be altered. The smaller ball bearings will be<br />
deflected through a greater angle than the larger ones.<br />
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