A student has the following equipment:
- two identical bar magnets
- a large sheet of plain white paper
- a small plotting compass
- a pencil
The student places the two magnets on the paper a short distance apart, with the North pole of one magnet facing the South pole of the other, as shown in the diagram below.
Describe a method the student could use to map both the shape and the direction of the magnetic field lines in the region surrounding and between the two magnets.