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Dipole With an Edge
Dipole at a corner
Electromagnetic field at the 
end of a tunnel
Graph of monopole Field Strength
Strong Electromagnetic field at
the end of a tunnel
Dipole Field Strength
Diploe above a sharp corner
Dipole above an obtuse corner
Dipole inside a sharp corner
Monopole near a point
Strong Dipole under a sharp
corner
Electromagnetic field strength 
of a dipole
Dipole in free space
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