Although we cannot see magnetic field lines, we can detect them using iron filings. The tiny pieces of iron line up in a magnetic field.

Zeeman for the observation that when a source of light is placed in a strong magnetic field the spectral lines of the light emitted by that source suffer marked modification. The general type ...

Bar magnets and horseshoe magnets are two of the most common shapes of magnet. The magnetic field is shown by lines with arrows that point from north to south. You can tell how old some coins are ...

has demonstrated how Earth's magnetic field may be influencing internal flow, using what they describe as a Little Earth Experiment. In their study published in the journal Physical Review Letters ...

The transfer manifested as a small beam of accelerated barium electrons heading toward Earth along the magnetic field line. The beam is visible only in the experiment's magnetic field line data.

Polarised light oscillates, which allows astronomers to “see” the particles around the black hole swirling around magnetic field lines to create a distinct pattern. The observations were made ...