Tufts OpenCourseware
Author: Fulcrum Institute Development Team

Roger Tobin: Energy Transfer in a Vacuum

In his physics laboratory, Roger investigated how radiation affects the rate of cooling of a black anodized aluminum cylinder. He ran two tests to compare cooling with and without the presence of air. In each test, he heated the cylinder to ~80°C and then monitored its temperature for the following 2 1/2 hours. In his first test, the cylinder was in a vacuum, so energy could only be transferred without matter.The second test was identical to the first except that, in this case, the cylinder was surrounded by air.

Watch the video below to learn more about Roger's investigation.