CRT televisions operate by shooting electrons at the screen Magnetic fields deflect moving electrons, so placing a magnet near the CRT gives you this neat way to visualize the magnetic field linespic.twitter.com/q1W8lv5Oqh
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This is why all CRT monitors at the
@NationalMagLab were monochrome back in the day. When you have a DC magnet ramping up to over 30 Tesla a few feet away, it seriously messes with a color display.
Yea I was reading about how on black and white you really won’t see it except around the white edges cause that’s where the electrons are hitting
