Skip to content

admin

7B13.50 – UV fluorescence

This demonstration illustrates absorption and fluorescence of differently coloured materials using UV light. It is also suitable for demonstrating scintillate materials and their working principle.
One of the electroscopes in the photographs suffers from static friction. Gently tap it to release the needle and you will see the needle deflecting.

1J20.70 – Rolling uphill [double cone]

This demonstration utilizes a double cone on a specifically designed ramp to illustrate the importance of the center of mass in determining the rolling direction. The track’s geometry creates an incline, but the double cone’s wider section reaches under the top of the rails as it rolls. Hence, lowering its center of mass despite the ramp’s slope and minimizing the system’s gravitational potential energy.

5A10.10 – Charge conservation [two buckets]

Wool and the short, yellow PVC pipe are a good combination: put the wool in one pot and stir/rub the PVC pipe against the wool. Then remove the PVC pipe from the pot and transfer it to the other pot.

One of the electroscopes in the photographs suffers from static friction. Gently tap it to release the needle and you will see the needle deflecting.