View Single Post
DrChinese
DrChinese is offline
#2
Feb17-11, 10:05 AM
Sci Advisor
PF Gold
DrChinese's Avatar
P: 5,147
Quote Quote by Soumya_M View Post
Entangled particles seem to have 'causal impact' on each other 'instantly' violating the allowed speed-limit of causal influence i.e. 'c'. When one of the entangled particles is measured it has an impact on the other instantly. These two events (i.e. 1. the measurement of the first particle and 2. the impact on the other particle) can be said to be causally related ('1.' being the cause and '2.' being the effect). But if that is true (and it certainly is), it means 'a cause' and 'its effect' can occur at the same instance of time. So what does that tell about causality? How can it be so? A cause and its effect must be clearly separated by time. Otherwise it would be impossible to say which is the cause and which is the effect.
You cannot really say that the first "caused" the second. The logic is just as accurate if you say the second caused the first.