This review aims to provide a simple introduction to the application of
optical correlation methods in colloidal science. In particular, I plan to show
that full appraisal of the intimate relation between light scattering and
microscopy allows designing novel powerful investigation techniques that
combine their powers. An extended version of this paper will appear in
"ColloidalFoundations of Nanoscience", edited by D. Berti and G. Palazzo,
Elsevier (ISBN 978-0-444-59541-6). I am very grateful to the publisher for
having granted me the permission to post this preprint on arXiv.Comment: 19 pages, 5 figure