Concept explainers
Why is it important that the ions have a known speed?
A. The radius of the orbit depends on the mass, the charge, and the speed. If the charge and the speed are the same, the orbit depends on only the mass.
B. The orbit must be circular, and this is the case for only a certain range of speeds.
C. If the ions are moving too fast, the magnetic field will not be able to bend their path to the detector.
D. The ions are all accelerated by the same electric field, and so will all have the same speed anyway.
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