This page from NASA's Earth Observatory shows images of visible tracks made in the Earth's atmosphere from clouds forming around ship exhaust particles. One of these images shows the relative sizes of the particles, and the text relates the relative sizes to the relative brightness of the clouds that are formed.
Goddard Space Flight Center. Ship Tracks South of Alaska. Greenbelt: Goddard Space Flight Center, March 31, 2009. https://earthobservatory.nasa.gov/images/37455/ship-tracks-south-of-alaska (accessed 18 June 2021).
%0 Electronic Source %D March 31, 2009 %T Ship Tracks South of Alaska %I Goddard Space Flight Center %V 2021 %N 18 June 2021 %8 March 31, 2009 %9 text/html %U https://earthobservatory.nasa.gov/images/37455/ship-tracks-south-of-alaska
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