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Slow Glass (Scenedow)

The most important effect, in the eyes of the average individual, was that light took a long time to pass through a sheet of slow glass. A new piece was always jet black because nothing had yet come through, but one could stand the glass beside, say, a woodland lake until the scene emerged, perhaps a year later. If the glass was then removed and installed in a dismal city flat, the flat would%u2014for that year%u2014appear to overlook the woodland lake.From Light of Other Days, by Bob Shaw. Published by Analog in 1968
Slow Glass (Scenedow) by Bob Shaw from Light of Other Days

light, waves, photography