File:PSM V28 D191 Light wave divergence traveling through different focal points.jpg

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Description Light wave divergence traveling through different focal points
Date between 1885 and 1886
date QS:P,+1885-00-00T00:00:00Z/8,P1319,+1885-00-00T00:00:00Z/9,P1326,+1886-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 28
Author Unknown authorUnknown author
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