Reflections from a river surface of rows of lights along a bridge. In the 0.5-sec exposure, the reflections are not blurred, but are instead drawn out into wiggly but sharp lines by the movement of the water ripples. There is interesting physics here, including the sharp images of the (small diameter) lamps, the variation of brightness along some tracks due to changes in magnification by the curved water surface, and the number of closed loops, presumably due to regularly spaced waves passing by.
—Gordon Robertson, University of Sydney
26 Feb 2018