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It depends on what theory of everything nature follows. There are some theories that predict that protons decay, so if one of the protons decays the particle with disintegrate as one proton and two neutrons are not a stable system.


I'm not actually familiar with the construction of these microscopes, but most devices using focused charged-particle beam rely on quadrupole magnets1 to maintain the control of the beam size and shape. It is worth noting that a quadrupole that focsuses the beam in one plane tends to de-focus it in an orthogonal plane, but by using sets of multiple ...

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