Radiometer wheel on pump unit
Experiment no.: 8.5.402
The pressure in a radiometer wheel illuminated with light can be controlled with a pump. It can be seen that it is only in a certain pressure range that both the mean free path of the air molecules is long enough and the number of air molecules is high enough to move the fan wheel.
Images for this experiment
Documents for this experiment
Movement of the molecules
Velocity distribution of N2
Velocity distribution of gases
Mean free path length