The Zeeman Effect
no they are not
The copper by itself will do nothing of the sort. It will be surrounded by magnetic field lines if a current flows through it. It is the current that produces the magnetic field lines.
Never
Different latitudes of the sun rotate at different speeds. This tends to twist and bend the magnetic field lines.
Fraunhofer realised that some of these dark lines were at the same position in effect called the Zeeman effect can also cause splitting of the spectral lines.
Spectroscopy.
The splitting of single spectral lines of an emission or absorption spectrum of a substance into three or more components when the substance is placed in a magnetic field. The effect occurs when several electron orbitals in the same shell, which normally have the same energy level, have different energies due to their different orientations in the magnetic field. A normal Zeeman effectis observed when a spectral line of an atom splits into three lines under a magnetic field. An anomalous Zeeman effectis observed if the spectral line splits into more than three lines. Astronomers can use the Zeeman effect to measure magnetic fields of stars. Compare Stark effect.
The Zeeman effect is the splitting of single spectral lines into three or more in the presence of a magnetic field.
Arnold Sommerfeld
They are called the magnetic field lines.
Dark lines of the absorption spectrum give the elemental composition of the chromosphere, information about the magnetic field and density of the surface. The peak of the continuous spectrum gives the surface temperature. The Doppler Effect shows the movement of the sun and the sun's surface. Splitting of spectral lines verifies the magnetism of sunspots.
Magnetic field lines don't cross.
Lines of Force
They are called the magnetic field lines.
straight parallel lines
The magnetic field lines are arranged circularly around the wire.
The closer the lines the stronger the magnetic field.