Lets Students Clearly See the Effect of Electric and Magnetic Fields on an Electron StreamCompact and economical, this all-in-one unit provides a dramatic demonstration for students.
The large orbital electron path is circular, providing good visibility and accuracy (±5%). Helmholtz coils are built in.The beam tube has a built-in engraved glass rod with a centimeter scale along its central axis that eliminates parallax when making diameter readings of the electron orbit.
We also include a hood that can be slipped over the apparatus so you can work without darkening the room.
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