"Rodney Blackall" wrote
...
In article ,
Szczepan Białek wrote:
We must distinguish the charges from the charged bodies. Droplets are
bodies. In electrostatics the positive meens defficiency of electrons and
negative the exces of electrons.in a body. Droplets when hang in the air
have exces of electrons. If they loss them have to fall down (Millican).
Good, so you can prove this by experiment.
Get two similar metal plates, connect them to the terminals of a large
potential difference. When you have a natural fog, turn on the voltage
source and see which plate collects most water.
Now I know that in electrostatic experiment should be used such isolators
which are negatively charged, because they do not collect water on their
surface. As I have any opportunity to make experiments I will be waiting
for ready results, like this:
http://www.physik.fu-berlin.de/~stelmas/SHG.html
Falk Tannhauser has given you a very good answer. Note that if you start
calculating the fall speed of raindrops, viscosity is important.
Falk tried to calculate. It is now rather difficult. It should be measured.
S*