Einstein's box
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George Gamow's make-believe experimental apparatus for validating the thought experiment at the Niels Bohr Institute in Copenhagen.
Einstein's box is a theoretical chamber in a thought experiment, from which trapped light is released one photon at a time.
A group of French physicists claim to have built such a box, 1.1 inches big, which allows them to capture a photon for a seventh of a second.[1]

