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Paper 4 ­ Particle Physics

Alpha Particle Scattering was an experiment in order to investigate the strucuture of the atom. An alpha particle source was aimed at an extremely thin gold foil. Three observations were made:
1. Most alpha particles passed straight through with little/no deflection. This indicated that most…

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r= mv
Bq



This shows that in a magnetic field, the radius of movement is proportional to momentum. This is useful when identifying particles from their tracks.

Frequency f = 1 2r
T , where T = v . Given the formula for r, the frequency of a particle moving…

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