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Electrostatics is concerned with the electrical fields and scalar potentials of stationary electrical charges and charge distributions. Use this for questions about electromagnetic situations in which currents and magnetic fields are absent, otherwise use the [electromagnetism] and/or [magnetic-fields] tags.

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How beam focusing looks like in electron microscope?

If you want to focus the light of a 1 mm wide emitter to 0.5 mm wide spot, you can achieve that by making the lens to move towards the emitter. (at some fraction of speed of light) In an electron gun …
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-4 votes

How does electron gun accelerates electrons?

After traveling far away from the positive grid, electron has lost half of the energy that it gained when traveling between the electrodes. Here's a numerical example that maybe explains why it must …
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