Hi,
I have a question which has pleagued me for many years. When you take
photograph of laser beams (pulse or continuous) in a direction slightly
opposite the propagation direction you get a series of periodic bright
regions in the photograph. The spacing is about 10cm. I have noted
this on many occassion.
Does anybody know why this occurs?
Sandy
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Sandy Yates / Area de Mecanica de Fluidos / Centro Politecnico Superior
Maria de Luna, 3 / 50015 ZARAGOZA. SPAIN
Phone: Spain +34 76 761000 ext 5045. Fax: Spain +34 76 761882
Email: sandy@ideafix.cps.unizar.es