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For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.

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What is the minimum radius of a circular corridor for the walls to appear straight?

TL;DR: Really, really big (exact numbers below) Seeing the wall "crossing" is hardly the issue. Seeing the outer wall bend even slightly toward the inner wall - looking as if the hallway gets narrowe …
Weckar E.'s user avatar
  • 1,930
1 vote

Would a steam powered plane be able to cross the Atlantic ocean?

It depends on how you define steam power Allow me to explain with the best example I have: Must nuclear reactors are extremely energy dense, but they ultimately use water-steam conversion to make pra …
Weckar E.'s user avatar
  • 1,930