A curved arrow on the Magnetic Field Cross-Section diagram. It shows the path the magnetic field takes as it leaves the coil, fans outward, and returns. Flux lines help you see the field's shape at a glance. Stronger arcs appear where the field is most intense. Gentler arcs appear at the edges where the field is weakening. The lines are a stylized visual aid, not a precise measurement. Actual field strength comes from the colored thermal background and the threshold markers (75 percent, 50 percent, 10 percent of peak). The arrowheads point outward and slightly downward at the apex of each arc because the field bends back toward the return path on the underside of the coil.
Flux lines are curved arrows that trace the path the field takes as it leaves the coil, fans outward, and bends back toward the return path underneath. They make the shape of the field easy to see at a glance, steeper arcs where the field is strong near the center and gentler arcs at the weakening edges. They are a stylized aid; the real strength comes from the colored background and the threshold markers.
