Measure the brightness of the sun with cooking oil and an index card Science Snacks activity

A dab of oil on a white card becomes a powerful tool for comparing the brightness of different light sources. Learn how to make your own oil spot photometer (and calculate the intensity of the sun) along with some interesting experiments to try. Full instructions for this activity are available at: Science Snacks are handson activities, projects, and experiments that are designed for the classroom and the curious. They re cheap, simple, safe, scientifically accurate, and teacher tested. Want to see more Check out 2015 Exploratorium, all rights reserved.