DCS# 7A10.10 | NWU# A-3 | Location: various |
title: Photo-Electric Effect aka: Zinc or lead exposed to UV light |
Description: A freshly sanded zinc plate is placed on an electroscope and charged both positively and negatively. The plate is illuminated with UV light. The negatively charged plate discharges, unless a glass filter is placed in front of the UV light. The positvely charged plate does not discharge. Questions: Explain why the positive plate does not discharge. |