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Thread ID: 147749	2019-04-01 06:21:00	Time TRavel and so on	piroska (17583)	PC World Chat

Post ID	Timestamp	Content	User
1459695	2019-04-04 20:23:00	If you want to twist your head about consider this. A lot of very bright people believe that we all live in a simulation and there is no way of knowing it.	CliveM (6007)
1459696	2019-04-04 20:34:00	I'm not sure a lot of people believe that, it has been proposed as a theory that a lot of people say is possible. That's a long way from belief. I have enough trouble with the double slit experiment and electrons behaving differently when observed and that's a real phenomenom. No need for crazy theories to twist my head about. I mean seriously, how does an electron know you are watching it.	dugimodo (138)
1459697	2019-04-04 20:47:00	None of these TV shows have addressed one issue. They zoom about the universe at FTL, starmap xxx, whatever...how exactly do you navigate? I would tell you but it really is a long explanation and I have to go and do some gardening. Ken :)	kenj (9738)
1459698	2019-04-04 20:52:00	I mean seriously, how does an electron know you are watching it. Either.... 1. feels a divergence in the Force 2. Gets warned by a lot of quarking from the Quarks Ken	kenj (9738)
1459699	2019-04-04 21:15:00	I mean seriously, how does an electron know you are watching it. you cant observe (measure) it without having a real influence on it. Initially being a probability function; once 'observed' or measured, it has a real detected position or speed (Im sure Ive got that a bit wrong) The double split experiment is pretty basic stuff . Just waves cancelling out or adding It gets really weird when they do the experiment with single photons of light . The cat is either dead or alive. Its not both . :-)	1101 (13337)
1459700	2019-04-04 21:31:00	Yeah but that's the thing, elctrons only give you the wave interference pattern if you don't try to observe what slit they pass through. As soon as you do that they stop acting as a wave and start acting like discrete particles and the interference pattern doesn't happen. The same is true for the individual photons you mention, act as a wave until observed then act as a particle. Obviously the act of observing what path they take somehow changes the results quite drastically, and that's the part that does my head in. en.wikipedia.org	dugimodo (138)
1459701	2019-04-04 21:43:00	here's a better one medium.com	dugimodo (138)
1459702	2019-04-05 07:11:00	I mean seriously, how does an electron know you are watching it. Possibly the answer is 42. Source: Weizmann Institute Of Science Summary: One of the most bizarre premises of quantum theory, which has long fascinated philosophers and physicists alike, states that by the very act of watching, the observer affects the observed reality. A thought experiment often used to illustrate the measurement problem is the "paradox" of Schrödinger's cat. A mechanism is arranged to kill a cat if a quantum event, such as the decay of a radioactive atom, occurs. Thus the fate of a large-scale object, the cat, is entangled with the fate of a quantum object, the atom. Prior to observation, according to the Schrödinger equation and numerous particle experiments, the atom is in a quantum superposition, a linear combination of decayed and undecayed states, which evolve with time. Therefore the cat should also be in a superposition, a linear combination of states that can be characterized as an "alive cat" and states that can be characterized as a "dead cat". Each of these possibilities is associated with a specific nonzero probability amplitude. However, a single, particular observation of the cat does not find a superposition: it always finds either a living cat, or a dead cat. After the measurement the cat is definitively alive or dead. The question is: How are the probabilities converted into an actual, sharply well-defined classical outcome?	piroska (17583)
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