A Crookes radiometer, despite what many explanations claim, does not work because of radiation pressure. When light strikes the vanes inside the near-vacuum chamber, it heats the vanes, which then ...

A nano-engineered structure that levitates when a laser of a similar intensity to sunlight is shone on it could help scientists to study a hard-to-reach region of the atmosphere. A standard Crookes ...

In this video I see how fast we can get a radiometer to spin by shining the world's brightest flashlight on it. Then I talk about the real reason the Crookes radiometer spins when you shine light on ...