PIRA Classification: 7A10.12
Description: An aluminum plate (work function = 4.1 eV) replaces the usual plate on an electroscope. A UV light shines on the uncharged scope. A positively charged rod is brought near the aluminum plate. The scope will charge positively.
Special Instructions: See 7A10.10
Condition: Good
Setup time: 2 minutes
Safety Issues: Do not shine the light on the students.