Photoelectric Effect with Electroscope

Identifier: L: W - 064

Concept Overview:

Visual demonstration of the photoelectric effect.

Step(s) to Follow	Expected Result
Put zinc metal on the electroscope and make sure the surface of the metal is clean from oxidation. Steel wool will clean the surface if necessary. Charge the grey PVC rod and put the accumulated negative charge on the zinc metal.	The electroscope should be displaced and stable from its uncharged rest position.
Shine a strong visible beam of light on the surface of the charged zinc metal.	The electroscope should remain unchanged from its charged state.
Shine a strong UV beam of light on the surface of the charged zinc metal.	The electroscope should start losing charge and displace back to its uncharged resting state.