Imagine a long circuit that goes around the Earth, or just spans a large enough distance to measure the effect, say 100'000 km.
The circuit has efficient light bulbs installed at each 10km mark. There is a power source connected which powers all the light bulbs.
Time N = all light bulbs are lit.
Time N+1 = the circuit is cut in the middle point, equidistant from the power supply terminals.
Question is, how do the light bulbs shut down along the timeline, starting with N+1.
- Do they turn off one by one starting from the middle point, or does it start from the terminals moving towards the middle point?
- Is the speed of propagation the same for both halves of the circuit?
- What is the propagation speed?
Thanks and sorry for stupidity if this question is trivial :)