Florida-Spectrum Environmental Services
Florida Spectrum: Chemical Fact Sheet: Selenium
Nice detailed synopsis of selenium, its properties and uses.
National Institutes of Health
National Institutes of Health: Dietary Supplement Fact Sheet: Selenium
Information on the dietary and nutritional significance of selenium from an authoritative source.
Science Education Resource Center at Carleton College
Serc: Virtual Photoelectric Lab
In this activity, students measure the relationship between kinetic energy of photoelectrons and the frequency of the incident light.
University of Wisconsin
The Why Files: Power Plants
Photovoltaic technology is compared and contrasted to the natural phenomenon of photosynthesis. The means by which photocells harness solar energy is described and explained.
University of Wisconsin
The Why Files: Positive Energy
A novel idea for converting solar energy to electrical energy. A brief discussion of solar energy collection in space via satellites.