13 LASER paradox in relativity



   Hello. Today, I'm going to take a look at what's registered on physics.stackexchange.com. This also corresponds to the paradox of relativity, which does not appear in any form of book. If the current theory of relativity does not have any logical deficiencies, this paradox should not occur. But the reality is not so. The contents are as follows.

https://physics.stackexchange.com/questions/16180/is-there-a-contradiction-of-the-theory-of-relativity-here-length-contraction
https://physics.stackexchange.com/questions/16180/is-there-a-contradiction-of-the-theory-of-relativity-here-length-contraction


Suppose there is a laser beam powerful enough to burn through iron aimed at a piece of iron. You observe this event while you are in the same frame as the piece of iron and the laser-beam generator. In this frame, there is a certain part of space that you know that the light is traveling through.

Fig. 1 Electromagnetic wave © helder100, 출처 Pixabay

Now say that you get in a rocket that travels a few meters away from the laser beam in a direction perpendicular to eventually at a constant speed arbitrarily close to the speed of light. As you do so, the area that you knew the light was traveling through contracts in the direction that you are traveling in.


Fig. 2 Non-relativistic interpretation 

Say that the amplitude that you think that the light has decreases to the point where the light would no longer be carrying enough energy to burn through the piece of iron. If you see the iron stop being burned by the laser, our universe is seriously weird. I don't think this would happen. Would you see the laser continue to burn through the iron even though it does not seem to you to have the energy necessary to do so? Would this mean that, instead of having the length contract, that there is such a thing as absolute distance?

Fig. 3 Relativistic analysis supporting length contraction

(If we suppose that the amplitude you perceive the laser to have remains constant regardless of what inertial frame you are in, then the laser would appear to have a constant amplitude even as objects around it continued to contract in the direction you are traveling through. This would mean that the laser would have to seem to affect more and more of space as you traveled faster and faster, so it seems it would have to seem to burn through more and more objects as you went faster, which doesn't seem right to me.)
Does this contradict the theory of relativity? Is there an error in here somewhere?
Thanks.

This is a sure contradiction. 
Do you have a good way to solve this paradox using length contractions?

    As far as length contraction is true, this problem is never solved. But if you can actually experiment with this, this paradox will be solved. If we actually experimented, could the rocket be destroyed or not? I cannot do that. The iron is either destroyed or not destroyed. If only one of the two opinions is right, this is a mystery that can not be solved forever.

 This problem, which is a mystery that cannot be solved by length contraction, can be easily solved by common sense when considering the length expansion. There is nothing to think about. Both observers agree exactly.


Fig. 4 Relativistic analysis supporting length expansion
   For an observer on a rocket, everything has been multiplied by γ in the direction of travel. Amplitude is multiplied by γ times, and when the explosion, the flame is multiplied by γ in the direction of movement. Just like a magnifying glass, it looks the same. The other thing is that the direction of the enlarged direction is one side of the direction. There is no contradiction here.

 Do you think this is so simple? I do as well. However, truth is inherently simple. There are various paradoxes in relativity. We also do tremendous calculations to solve the paradox, add hypotheses, and debate our heads to keep them tidy. In essence, however, there is no paradox in relativity. Nature always has its own rules. But only human beings do not know it. I think this is so.

 When many paradoxes of relativity think of expansion as a right relativistic length, they are released immediately. There is no need for complicated calculations, difficult philosophy, or additional hypotheses. Now it is up to you to choose which theory is right for length contraction and length expansion.

















Comments

Post a Comment

Popular posts from this blog

06 Muon Paradox

Image
   Today, I would like to talk about the muon paradox. There are several subatomic particles that are smaller than atoms, such as a μ-meson. It is called a μ-meson, but it is abbreviated to muon. The lifetime of this muon is fixed. The proper lifetime of this particle is 2.2 μsec. It only survives for a very short moment, and then  it collapses into other particles. Cosmic-rays are constantly coming out of space due to the explosion of stars in the universe or the nuclear fusion reaction of the sun. At this time, the cosmic-ray and the earth's atmosphere react to create a muon. Muon's speed is near the speed of light when it falls to Earth. It drops at a rate of about 0.998c. However, even if it falls so fast, it cannot reach the ground because its life is short. If the muon has a lifetime of 2.2 μ sec and a speed of 0.998 c, the muon can run about 650 m from the point where it was created. The point where the usual muon occurs is about 10km above sea le...
Read more

10 Rotating disc of black hole and Ehrenfest's paradox

Image
  Black holes are unusual in many ways. Thet have also has a spinning disc, a jet, a Schwartzchild radius, a horizon of events and singularities. But there is one thing that can not be explained in modern science or the theory of relativity. It is the rotating disc of a black hole. Black hole and Ehrenfest paradox   The speed at which materials rotate in the rotating disk of a black hole is almost as close as the speed of light. If so, all the materials must be decomposed and discarded by the Lorentz contraction. However, the rotating disk of a black hole certainly exists. It is definitely a contradiction. In fact, these are linked to the famous paradox of the Ehrenfest paradox. [1] Today, we will look at the Ehrenfest paradox. Fig. 1 Paul Ehrenfest Personally, I think Erlenpest paradox is the best of relativity's paradoxes. Other paradoxes seem to be a little simpler than this paradox. The list of people who studied this paradox is very extensive. Ein...
Read more

31. Ehrenfest Paradox 2: Does the length of a rotating circumference change?

Image
  We looked at the Ehrenfest paradox last time. There are two issues in the Ehrenfest paradox. The first assumes a disc made up of an ideal rigid body, but when rotated at relativistic speed, it ruptures. The second is that the perimeter of a rotating body is different from its length when it is stationary. In the last post I looked at the first issue, and this time I want to look at the second issue. For those who have not read the first part, I will briefly introduce this paradox. It is best to read the previous post. Below is a link to the first part. The Ehrenfest paradox part I Rotating disc and length contraction   In relativity, objects that run very fast are said to shrink in length. So the official name of this is Lorentz - Fitzgerald Length contraction. It is not 'Einstein's length contraction'. This was born regardless of the theory of relativity. Before the theory of relativity was published, several people experimented to detect ether, but the...
Read more