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Found 11 results

  1. I just recently stumbled upon a Quora question regarding Ehrenfest Paradox, and noticed that people were giving completely wrong answers to it. Basically the paradox is this; In terms of Special Relativity, how does spinning disk work in special relativity, if the circumference of the rotating disk undergoes length-contraction (since it's parallel to motion) while its radius does not (since it's perpendicular to motion), and this would imply that [math]\frac{circumference}{diameter} \neq \pi [/math]. I checked bunch of similar questions of the same topic, and can't find a single person g
  2. It was a running race between Newton and Einstein. I want to know who gets to the platform first, and how much time do they need?
  3. The fifth scene: 2020.3.9 Given "u" the velocity of A relative to the earth, "w" the velocity of spaceship B relative to A, you should find "v" the velocity of B relative to the earth. ------->velocity positive direction Earth ……………………………….A…………………………………….B ……………………………………....u...…………………........…......…..v u is the velocity of A relative to the Earth v is the velocity of B relative to the Earth x is the velocity of Earth relative to B w is the velocity of B relative to the A Presume: u=0.2C, w=0.8C w = (u-v)/(1-uv/c^2) = (0.2C - v)/(1-0.2C*v/C^2) = 0.8C 0.2-v=(1-0.2v)*0.8 0.84v = -0.6 v
  4. We've been talking about gravitational fields holding light. Now let's go back to special relativity and ask some questions about it. Let's see how they answer. Let's continue to look at the following scenario according to the mainstream special relativity. https://photos.app.goo.gl/6wQLwbjZ6bX2GMF8A Attached xplanet1.gif B flies to Planet X at a speed of 0.9c relative to A on Earth. In A's opinion, it takes L / C = 10 seconds for B to reach Planet X. According to the special theory of relativity, the elapsed time of B is 10 seconds * sqrt (1-V*V/(C*C)) = 4.35 seconds. Now let's make this st
  5. There has been alot of discussion about special relativity on this forum here are the Stanford lectures on the subject for everyone to view.
  6. This problem was originally embedded deep within another topic, and only one person attemped to answer it. That attempt failed to address the issues. Circular reasoning was the approach used, which is not acceptable in Physics. THE DILATION OF TIME CONUNDRUM Two unmoving spaceships: A & B are the same distance from an observation point C. The observer at point C sends a signal in both directions which will reach A & B after the same amount of time. This signal thus starts both spaceships moving simultaneously. Both spaceships accelerate identically and reach the same high velocity on
  7. The Unified Theory Of Relativity A unified description of acceleration that doesn't distinguish between straight geodesic worldlines in curved spacetime and curved worldlines in flat spacetime, thereby simplifying and unifying the special and the general theories of relativity. Summary Special relativity describes acceleration as objects following curved paths through flat spacetime while general relativity describes acceleration as objects following straight paths through flat space time but these are entirely interchangable and equivalent because the curvature of spacetime can only ever be
  8. What the Observer saw. Up front I admit I have only a limited understanding of Relativity and in particular what it means to have light travel at (c + v). In order to understand this better let's consider the classical train/platform thought experiment with lightning bolts at each end of the train. Because light travels at c in both frames then the time to reach the middle in each case is simply c/(l/2) where l is the length of the train. Both experience this in their own frame. Now let's consider a train with a window in the middle where the passenger sits, so the station master can't
  9. The twin paradox is a great way to show what special relativity models and it's something that most people who want to understand it get stuck on. First it's important to understand basic Galilean relativity, all motion is relative. That just means that there's no distinction between object A moving away from object B and object B moving away from object A. Adding more objects for comparison makes no difference because an object at rest relative to one would in motion relative to the other. Special relativity is based on the speed of light being the same for all inertial (non accelerating) ob
  10. It seems to me that QM and SR would treat light beams in different ways. SR indicates that a light pulse acts like a ball in classical mechanics, for example a light clock where a particle motion in someone else's reference frame is measured in my reference frame. We get a bouncing ball moving in diagonals. Surely QM would say that you cannot see, or even know, what is happening to the "bouncing ball" when it is travelling between the mirrors. All we can see is the events as it strikes the mirror. Now let's take a simple example of a moving train. A flash of light occurs in the middle of
  11. Is this theory described in this link https://figshare.com/articles/Nokton_theory/1549720 respects special relativity conditions.
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