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Infinite Corridor
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==Demonstrations== During the 1960s, a common Technology Day demonstration used the unobstructed length of the corridor to demonstrate the [[speed of light]] in a simple, direct way. A [[strobe light]], [[photocell]], and [[oscilloscope]] were positioned at one end of the corridor, and a mirror at the other. The round-trip time is about 1.67 microseconds. The photocell picked up both the direct and reflected flashes. The flash duration being well under a microsecond, the result was two nicely separated pulses on the oscilloscope screen, which could be measured to compute the speed.
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