What is going on here? Mystery photos 81 in the series.

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Mystery Photos 81  Answer

                               

The left photo shows 1.3 second exposure and shows a variety of moths and other insects flying around a 500 W light in spring in rural Australia. There is plenty of detail on the enlarged view showing the patterns made by the beating wings.

On some of my shorter exposures of 1/60 sec it can be shown that some of these are beating at 500 Hz for the tiny ones and 27 Hz for the large ones.

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Photo Date: July 25, 2007