STEM Lessons for College Students

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

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.

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