Loading subject…
Aurora
An aurora is a natural light display caused by charged particles interacting with Earth’s atmosphere.
Compass
A compass is a device that uses a magnetised needle to show direction using Earth’s magnetic field.
Magnetic domain
A tiny region inside a magnetic material where many atomic magnets (mainly due to electron behavior) are aligned in the same direction, so the region acts like a small magnet.
Magnetic field
A region of space around a magnet (or other source) where magnetic forces act on magnetic materials or moving charges.
Magnetic field line
A line drawn so that its direction at any point shows the direction a compass needle would point; closer spacing of lines indicates a stronger magnetic field.
Uniform magnetic field
A magnetic field that has the same strength and direction at every point in a region (represented by straight, parallel, equally spaced field lines).