- Transparent plastic container for 3-D magnetic field force lines
[Overall Advantages to Users]
- Observation of magnetic field became easier and clearer with the sealed iron powder and silicone oil in plastic container, which has a hole for bar magnet in center.
- By inserting the bar magnet in the hole, 3-D magnetic force lines will soon appear in the container.
- In order to observe the magnetic field, take out the bar magnet from the container first and shake the box until the iron powder is dispersed evenly and clearly. Then, return the magnet into the hole in the middle of container. After a while, magnetic force field lines will appear inside as 3-D structure.