Applied Science

Obeying the law (of physics)! Kinetic energy and momentum explained (2014x31)

Air date: Dec 09, 2014

In my video on the Crookes Radiometer, I showed that the devices spin because of a thermal gas effect -- not the force of photons hitting the vanes. In the comments section, someone asked about kinetic energy and how incoming photons impart force to the rotor. This video is a more complete answer to that question.