It’s actually inverse cube for magnets - see https://en.wikipedia.org/wiki/Force_between_magnets https://en.wikipedia.org/wiki/Force_between_magnets : “One char

It’s actually inverse cube for magnets - see https://en.wikipedia.org/wiki/Force_between_magnets https://en.wikipedia.org/wiki/Force_between_magnets : “One characteristic of a dipole field is that the strength of the field falls off inversely with the cube of the distance from the magnet's center.”