I have a question. In Michael's article he states that grain is binary and that it is 2 microns in length. Can anyone point me to a technical reference about this? He gives no reference, and this is something that I don't recall reading in the past.
Thanks,
George
Here is a pretty good explanation -- be sure to read the development section on page 2.
http://science.howstuffworks.com/film6.htm
