But as the gelatinous orbs in our skull can perceive only a tiny fraction of the EM spectrum, we have to take those textbook diagrams ... magnet at a time; visualizing complex magnetic fields ...

A permanent magnet is always magnetic. It has an invisible magnetic field. Only certain materials, such as iron, feel a magnetic force. Permanent magnets can come in lots of different shapes and ...

When you have the ability to squeeze many smaller magnets into a tiny spot and adjust their north/south orientations at will, you can not only control the strength of the overall magnetic field ...

That’s basically a force field that surrounds the planet. Any object with a magnetic field is a magnet — including the Earth itself. Like bar magnets, Earth has a north magnetic pole and a ...