The 251-meter hallway at MIT that functions as a solar observatory and physics lab
In short: The Infinite Corridor is more than a simple transit route connecting MIT buildings. It is a site of precise celestial alignments, a living model of the solar system, and a unique laboratory where students have measured the speed of light and modeled the complex dynamics of human pedestrian traffic.
Spanning 251 meters, the Infinite Corridor serves as the central artery of MIT's original campus, which was planned by architect William W. Bosworth in 1913. While it provides the primary indoor path between the east and west ends of the university, its utility extends far beyond mere navigation. The space acts as a social and cultural hub, hosting everything from student-led fundraisers and art installations to elaborate practical jokes known as hacks, such as the 1985 transformation of the hallway into a simulated highway.
The corridor is perhaps best known for MIThenge, a biannual event where the setting sun aligns perfectly with the hallway's length, flooding it with light. While often compared to Stonehenge, the phenomenon is more akin to the light-capturing designs of ancient sites like Newgrange. First popularized in the mid-1970s, these alignments occur around late January and mid-November. A more subtle lunar alignment also exists, though it is harder to observe due to physical obstructions at the eastern end of the campus.
Beyond its architectural and celestial significance, the corridor serves as a practical research environment. In the 1960s, it was used to demonstrate the speed of light using strobe lights and mirrors, yielding a round-trip time of approximately 1.67 microseconds. More recently, in 2018, a 1:30,000,000,000 scale model of the solar system was installed along 200 meters of the third floor. At this scale, walking through the corridor allows a person to effectively travel at warp speed, surpassing the cosmic speed limit of light.
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Sources
- Summary by Intellect · source: Infinite Corridor
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