In message , Clive Mitchell
writes
In message , Andrew Gabriel
writes
BTW, here's a nice experiment you can carry out to observe this effect
in a fluorescent lamp. Take a lamp firmly fixed to a long cord (such
as a car service/inspection lamp), and go out into a large dark area
(e.g. outside at night) where there are no objects for many feet in
any direction. Switch the lamp on, and swing it round and round over
your head on the end of the cord. As it passes in front of you each
time, you will see the stroboscopic effect of the different colour
components which make up the white light, and in particular you will
notice how they are all out of phase with each other, with some of the
phosphor components having much longer persistance than others.
Obviously be careful here -- if you manage to hurl a car inspection
lamp through your neighbour's window, don't come crying to me...

Hmm. I just tried this with a dual lamp 8' fixture and it
disintegrated when I got up to approximately 120rpm. It's made a real
mess of the patio.


You failed the Darth Vader test then

--
geoff