- #1
LucasGB
- 181
- 0
I know this is probably an extremely simple question, but anyway...
I shoot two particles towards each other. They collide, and then go their separate ways. Then I measure the position of particle A with full precision. This will allow me to determine with full certainty the position of particle B. A friend of mine is sitting somewhere else, sees particle B flying by and thinks to himself "I'm kinda bored, I'm going to measure this particle's momentum". He does so, with full precision, and is thus able to determine the momentum of particle A, with certainty. We meet up later for drinks and discover that adding together what we discovered we have determined with full certainty the position and the momentum of both particles.
So what's wrong?
I shoot two particles towards each other. They collide, and then go their separate ways. Then I measure the position of particle A with full precision. This will allow me to determine with full certainty the position of particle B. A friend of mine is sitting somewhere else, sees particle B flying by and thinks to himself "I'm kinda bored, I'm going to measure this particle's momentum". He does so, with full precision, and is thus able to determine the momentum of particle A, with certainty. We meet up later for drinks and discover that adding together what we discovered we have determined with full certainty the position and the momentum of both particles.
So what's wrong?