PHOTOELECTRIC EFFECT

The poweroint enables students to visualize the photoelectric effect. It therefore would make a good introduction to this difficult concept. It shows, in an animated way, what happens when light photos of different frequencies hit a metal surface.
It explains the threshold frequency, work function and why photoelectrons are emitted with a range of kinetic energies.
To aid understanding everything is done in stages so that each step can be explained by the teacher.

The first file covers all the whole topic and includes why classical theory could not explain it and how Einstein did. There are words to complete and questions to answer. The fifth, and last page consists of six questions.
The second file has the answers.
The third file has all the essential points and could be used as a summary of the topic or as revision.
The fourth file covers stopping potential and includes a little practice with straight line graphs.
The fifth file has the answers.