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Homework Help: Magnetism; the path of electrons

  1. Apr 26, 2013 #1
    The path of electrons emerging grom an accelerator must be bent by 90° by a 'bending magnet' so as not to strike a barrier in their path a distance d from their exit hole in the accelerator.
    Show that the field B in de bending magnet, which we assume is uniform and can extend over an area d*d, must have magnitude B >= sq rt (2*m*K/e²d²), with m the mass of a proton and K is its kinetic energy.

    How can I solve this porblem?
    I realy don't see it...
  2. jcsd
  3. Apr 26, 2013 #2

    Simon Bridge

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    Science Advisor
    Homework Helper

    Welcome to PF;
    You know that magnets can turn charged particles?
    How do they do this?
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