The Exploratorium is a 21st-century learning laboratory and museum based in San Francisco. For more than forty years, we’ve built creative, thought-provoking exhibits, tools, programs, and experiences that ignite curiosity, encourage exploration, and lead to profound learning. The science "snacks" on this website are fun, hands-on activities developed and thoroughly tested by the Exploratorium Teacher Institute. Dive in and discover what we're all about!
Listen to a beam of light! Learn how to build a simple device in which the signal from a radio is transmitted on a beam of light traveling between a light-emitting diode (LED) and a solar cell. Developed by Exploratorium Teacher Institute staff Don Rathjen and demonstrated by Exploratorium Senior Scientist Paul Doherty.