In this article, the underlying logic of experimentation is exemplified within the context of a photoelectrical experiment for students taking a high school engineering, technology, or chemistry class. Students assume the role of photochemists as they plan, fabricate, and experiment with a solar cell made of copper and an aqueous solution of sodium chloride. This multidisciplinary activity enables students to examine principles of chemistry, photonics, and electricity while reflecting the "Standards for Technological Literacy" and the "National Science Education Standards." (Contains 5 tables and 4 figures.)