The class room magnetograph
You need:
- - Laser
- - Compass needle
- - Small mirror (or piece of glass)
Glue the mirror on top of the compass needle. Put the laser source
in one end of the room and the compass with the mirror in the other
end. Let the laser beam be reflected by the little mirror and mark
the position on the wall under normal conditions. During auroral
activity, the geomagnetic field is altered, and the reflected beam
moves away from its normal position.
Franck Pettersen
Last modified: Tue Oct 1 16:04:36 MET DST