3 ms·

While theoretically possible, it'll be very difficult to realize physically. If you allow fractal constructions, purely unrectifiable sets can fit the bill. F

While theoretically possible, it'll be very difficult to realize physically. If you allow fractal constructions, purely unrectifiable sets can fit the bill. For example, here's an example in 2-dimensional space that casts a solid shadow when the light source is along one axis but not from any other: https://books.google.com/books?id=usjNBQAAQBAJ&lpg=PP1&dq=&pg=PA34#v=onepage&q&f=false https://books.google.com/books?id=usjNBQAAQBAJ&lpg=PP1&dq=&p...

nightcracker 11y ago
With millisecond precision I think it's even theoretically impossible as the slits would become so small it destroys the shadow in an effect seen in the double slit experiment. But that's just a gut feeling.
- Const-me 11y ago
  You'll have to make 500 meters thick clock, but theoretically it's possible.
  - meric 11y ago
    And practically, too, perhaps not politically or economically possible.