Simultaneity and Relativity | Physics with Professor Matt Anderson | M29-03

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Physics with Professor Matt Anderson

Physics with Professor Matt Anderson

2 жыл бұрын

Can two events happen simultaneously? Does it depend on the observer? Hmmm...let's see.
Physics with Professor Matt Anderson

Пікірлер: 25
@reluctantrealist6861
@reluctantrealist6861 Жыл бұрын
I don't understand. I agree that Planet B would see Supernova B first but wouldn't they know that Supernova B was closer and thus calculate that the events did happen at the same time?
@RobertMerithew
@RobertMerithew Жыл бұрын
Yes, you're right. It looks (to me) like Mr. Anderson has made a mistake. If planet X and Earth are not moving relative to each other, observers on both planets would agree that the supernovae are simultaneous. In the context of relativity, we talk about observers who understand that the light takes time to reach them. According to the (special) theory of relativity, whether the supernovae are simultaneous does not depend on the locations of the observers, only on their relative motion.
@wizkaleeb662
@wizkaleeb662 Жыл бұрын
@@RobertMerithew I don't think it's a mistake. This video is just going over a simplified thought experiment described by Einstein, who published his work on general relativity over a century ago. These types things weren't necessarily a given back then, and the concept of "simultaneity" was present other theories.
@wizkaleeb662
@wizkaleeb662 Жыл бұрын
Ok it finally clicked for me. In general relativity, the idea of two events "happening at the same time" is irrelevant because it also depends on where those events happen in 3D space. So when we are talking about gravity and 4-dimensional spacetime, the "time" an event happens and "where" it happens is all relative and part of defining the event itself. So two "simultaneous" events in spacetime are the same events happening at "the same time and in the same place". In other words, the same event. So the traditional idea of "simultaneity" doesn't apply to spacetime. I think that's the idea of where this discussion leads to
@reluctantrealist6861
@reluctantrealist6861 Жыл бұрын
@@wizkaleeb662 thanks, I had wondered exactly the same thing.
@wizkaleeb662
@wizkaleeb662 Жыл бұрын
@@reluctantrealist6861 yea I just think this video was kind of confusing out of context. I normally see this idea demonstrated with a smaller scale example. Like, "You are an observer watching a train pass by with two blinking lights on opposite ends. There is another observer on the train...etc etc"
@SamFugarino
@SamFugarino 2 жыл бұрын
Really good presentation. You make it fun.
@anandbavkar8572
@anandbavkar8572 2 ай бұрын
This video is not just confusing or misleading but outright incorrect.
@fizixx
@fizixx 2 жыл бұрын
Terrific intro to what's going to be more way kewl stuff! 🎉
@yoprofmatt
@yoprofmatt 2 жыл бұрын
Thanks Fizixx, good to keep hearing from you.
@fizixx
@fizixx 2 жыл бұрын
@@yoprofmatt 😎
@sanjaysingh-xf4tc
@sanjaysingh-xf4tc 2 жыл бұрын
Hello sir I'm your fan from India. Please tell me about your teaching board
@yoprofmatt
@yoprofmatt 2 жыл бұрын
Hello India! Love my Fandersons™ from India. Board info: www.learning.glass Cheers, Dr. A
@CausalDiscoveries
@CausalDiscoveries 10 ай бұрын
Relativity of simultaneity leads to an irrecoverable contradiction-not simply a paradox, but a damning contradiction. Say two distant instantaneous events (A and B) take place such that one inertial frame calculates they occur at the same time, this means other frames could calculate A occurs before B, while still others calculate B occurs before A. Since any inertial frame exists at any one point in space and time, one can then say, the moment and place A occurs, the following is true about B: it occurs in A’s past and future (i.e., not past). The fact that each conclusion (B is past or future) is derived from different inertial frames is irrelevant… in reality B cannot occur both before and after A. It’s one, the other or neither, which means the one frame that predicts this true state of affairs (even if we’re unaware of which frame it is) is the “preferred” frame. This reasoning proves relativity’s light postulate is false, which means relativity is false, making its predictions still correct but now for the wrong reasons. Why does it matter that relativity is right for the wrong reasons? Why not just keep it if it works? Well that’s probably the same line of thinking that kept the earth-centered planetary model the dominant model for over 1500 years. Imagine what we’d miss without a sun-centered model. What are we missing with relativity? For starters, the cause of time dilation, the cause of the specific force we call gravity, and a solid foundation from which to derive a quantum theory of gravity. Join me at my channel as I investigate the heart of a new scientific revolution: universal specificity.
@CausalDiscoveries
@CausalDiscoveries 9 ай бұрын
How do you know there is no preferred frame?
@CausalDiscoveries
@CausalDiscoveries 9 ай бұрын
Relativity starts by assuming (not proving) there is no preferred frame, so of course it is logically inconsistent with the existence of a preferred frame. Two light speed models are equally plausible, the preferred frame and the light postulate of relativity. Why the physics community sides with relativity as the gospel truth with the dogmatic fervor of football fans, especially given the fact that both light models are equally plausible and the available evidence supports either (doesn’t disprove either), is beyond me.
@CausalDiscoveries
@CausalDiscoveries 9 ай бұрын
Say what you want, relativity is based on the assumption that a preferred frame doesn’t exist; that is what is implied by the light postulate, which is assumed to be true. Relativity predictions are consistent with experimental findings, true. Just considering special relativity, then so is Lorentz ether theory (LET)-just as consistent as relativity since it makes the same verifiable predictions. From the other thread on another YT video, your use of the term logic/logical requires a redefinition of the law of identity and non-contradiction to make relativity non “contradictory”, and that redefinition is not required by LET. You can arbitrarily redefine the words you use to avoid “contradictions” of non-verifiable predictions of relativity, but that doesn’t resolve the contradictions. I’m not screaming or hollering this fact, just giving you the opportunity to become aware of it.
@CausalDiscoveries
@CausalDiscoveries 9 ай бұрын
I don’t see any further conversation as productive. My standards of rational discourse required Aristotelian logic not a modified physics logic.
@CausalDiscoveries
@CausalDiscoveries 9 ай бұрын
Apparently without Aristotelian logic no one else will understand relativity either.
@labidifaycal3185
@labidifaycal3185 9 күн бұрын
Relativity is WRONG , THE PROOF : how do you know that the two events occur at the same time or not even before both signals arrive at the two observers. That means you AGREE that a former " non relativistic" or " classical" frame of reference is needed to validate the simultaneity or not of events. Relativity is under many contradictions and over the history these errors are not discussed because of two main reasons: 1- the overwhelming of Quantum mechanics more rich experimentaly and its applications are several from the molecular level to atomic then to sub-atomic, and the diversity of phenomenological surprises. 2- the force of the new ideology : EINSTEINISM , which means : you are only rediculous if you try to prove Einstein wrong.
@ipergiovanni
@ipergiovanni 5 ай бұрын
Will 2024 finally be the year Einstein is knocked off his pedestal? Stationmaster Bob is stopped in the center of the station and train conductor Alice is stopped in the center of Einstein's infamous train moving relative to the station. When Alice is exactly in front of Bob, for Bob, two stones hit simultaneously, the first, a firecracker at the head of the train, and the second stone, a firecracker at the tail of the train. Since the two sound wave fronts reach Bob simultaneously, but do not reach Alice simultaneously, the academic donkey deduces the physical nonsense that only for Bob the two stones hit the head and tail of the train simultaneously. In reality, according to universally shared and recognized physics, and for which the speed of sound does not depend on the speed of the sound source, the two events which for Bob are simultaneous, are not for Alice, because Alice, at the center of the train, moving forward together with the train, he first hears the sound wave front coming from the firecracker in front of the train and then the one from the firecracker behind the train. Replace the two sound fronts with the two light fronts of the infamous 1905 article and you discover that the academic donkey mentioned above was Albert Einstein. It seems to me that it cannot be demonstrated more clearly than this what I demonstrated and wrote in another way for the first time in the remote summer of 2019, namely that the Einsteinian relative simultaneity is the consequence of nothing less than a systematic error, with many regards to consequential: kinematic dilation of time and kinematic contraction of lengths. Systematic Error (Treccani online encyclopedia): in physics, systematic errors are called those which, despite repeating the measurement several times, always occur in the same way, because they are due to imperfections of the instrument or incorrect measurement methods. Shall we throw Einstein, finally in 2024, off the pedestal? Or how much longer do we need to wait to free humanity's mental energies to give life to a true physical theory and not a mathematical theory like RR? Giovanni from Italy.
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