The time between changing the state of the switch and the affect it has on the bulb can not be any faster than the speed of light.
In Derek's example the switch and the bulb are 1 meter away from each other and therefore the time is 1/c seconds, i.e the time light takes to travel 1 meter.
The topic is definitely a little confusion, but there are no GR violations.
>In Derek's example the switch and the bulb are 1 meter away from each other and therefore the time is 1/c seconds, i.e the time light takes to travel 1 meter.
Perhaps I didn't make my example clear. Imagine loop with 2 switches...one switch 1 LY away...another switch 1 meter away.
Derek flips the 1m switch and light instantly turns on: What does that tell you?
Derek flips the 1m switch and light doesn't turn on: What does that tell you?
How were you able to find out that information before waiting 1 yr?
From what I understand, in your setup the lightbulb will turn on and quickly turn off, irrespective of the state of the other switch which is 1 yr away. Then after 1 yr passes it will react according to the state of the other switch.
In Derek's example the switch and the bulb are 1 meter away from each other and therefore the time is 1/c seconds, i.e the time light takes to travel 1 meter.
The topic is definitely a little confusion, but there are no GR violations.