| Particle Motion in Fields How1 #723115 In the presence of an electric field a charged particle is accelerated and has a linear motion, it follows a straight line until it hits matter. In the presence of a magnetic field, its energy is not modified but its trajectory is curved into a circle, which radius is proportional to its energy. This property is used to measure the particle energies: the softer the particle is, the smaller the circle will be. |
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