Modern Physics > Atomic Physics > Electron Properties
DCS# 7B35.50

PADDLE WHEEL



APPARATUS
paddle wheel tube on stand
202-19-B1
induction coil
202-18-B-1


DESCRIPTION
The electron beam will turn the paddle wheel, demonstrating that electrons have momentum.  Reverse the polarity of the voltage and the paddle wheel will change direction.  As an added bonus, the paddle wheel fluoresces.

Use caution around the high voltage power supply and exposed contacts.