English: a) Prehistoric shadowgraphy, b) Sunlight shadowgram of a martini glass, c) "Docused" shadowgram of a common firecracker explosion, d) "Edgerton" shadowgram of the firing of an AK-47 assault rifle.
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{{Information |Description={{en|author:G. S. Settles, Source: Penn State Gas Dynamics Lab, URL: www.mne.psu.edu/PSGDL}} |Source=Transferred from [http://en.wikipedia.org en.wikipedia] |Date={{Original upload date|2006-05-06}} |Author=Original uploader ...
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