True, but for the common case where the distance from the magnet is substantiall...

		mikeash on March 20, 2012 \| parent \| context \| favorite \| on: Seagate hits 1 terabit per square inch, 60TB hard ... True, but for the common case where the distance from the magnet is substantially greater than the distance between the poles, inverse cube is plenty good enough as an approximation.