Timeline for The special theory of relativity angle contradiction
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
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| Feb 22, 2017 at 12:58 | comment | added | Peter Shor | A laser is not a magic black box that emits light in the direction that it is pointed. To answer this question, you have to understand how a laser works. | |
| Feb 20, 2017 at 20:48 | comment | added | RenatoRenatoRenato | @Mathlover in an ideal situations which is having the chance to know the position of the extreme points of the rod at the {\bf exact same time} (That is not possible in practical aspects) the observer at rest sees the rod vertical and not tilted, that's why you can still consider it vertical like the other user said, so in this sense again, the apparent rotation is not relevant to your question, it was just to clarify the possibility of seeing different angles which you said it didn't make sense. | |
| Feb 20, 2017 at 20:42 | comment | added | RenatoRenatoRenato | @Mathlover apparent rotation is something that happens, we cannot avoid it cause of the finitness of the speed of light. It doesn't answer your question, I was just pointing it out the fact that the two observer can see different angles which was something that it seemed that bothered me. The rod is vertical, it's just the observer at rest that sees it it rotated ( he sees it tilted with its head pointing in the direction opposite to the one of the motion). This is not an answer to your question, I just wanted to make you see the fact that they can observe different angles. | |
| Feb 20, 2017 at 20:11 | comment | added | Mathlover | @Runlikehell If it is like optical illusion to rotate $\alpha$ for outside observer but $90^0$ for inside observer , what can happen when we put one more laser gun next to sensor and one more sensor next to current laser gun? We should see opposite $\alpha$ rotate for second sensor on floor. Thus, Apparent rotation is not sense if we think in this way. What do you think about this? | |
| Feb 20, 2017 at 18:22 | history | edited | Mathlover | CC BY-SA 3.0 |
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| Feb 20, 2017 at 17:17 | comment | added | RenatoRenatoRenato | Of course it is only an apparent rotation, plus he would see the rod tilted with its head pointing in the direction opposite to the one of the motion. But the OP asked in comments if the two observers saw different angles, that's why I advocated the rotation, even if it is an apparent rotation, the observer at rest sees another angle. | |
| Feb 20, 2017 at 14:51 | history | edited | Qmechanic♦ | CC BY-SA 3.0 |
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| Feb 20, 2017 at 14:00 | comment | added | user139020 | Observer who is at rest will see photon coming at oblique angle. In this case the source, the photon and the sensor on the top always have the same x coordinate. Terrell rotation is purely optical illusion. If the sphere is semi - transparent and a measuring rod is placed inside the sphere, on a picture we will see that sphere is rotated and measuring rod is contracted. | |
| Feb 20, 2017 at 13:45 | comment | added | RenatoRenatoRenato | Yes I think the observers see different angles. Because of Lorentz contraction you see an object in motion relative to you rotated, that's an apparent rotation known as Terrell rotation. But the guy inside doesn't make any adjustment, if he did change the angle the light beam wouldn't hit the detector in his own reference frame. | |
| Feb 20, 2017 at 13:34 | answer | added | user139020 | timeline score: 1 | |
| Feb 20, 2017 at 12:44 | answer | added | Hans de Vries | timeline score: 5 | |
| Feb 20, 2017 at 11:04 | history | edited | Mathlover | CC BY-SA 3.0 |
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| Feb 20, 2017 at 10:59 | comment | added | Mathlover | @Runlikehell Will the outside observer see that the laser equipment angle changed to $\alpha$ although the inside observer claims that no need to change from $90^0$? Is not it absurd? Because when the box stopped the events will not be not much . If the laser equipment angle is also $90^0$ for outside observer , the light should be clever to know the direction of the box. It means there should be an ether as the same we observe this kind of actions in the river. I wonder how we eliminate this dilemma. | |
| Feb 20, 2017 at 9:43 | comment | added | RenatoRenatoRenato | There isn't an adjustment to be made or an angle to be changed, in the box you shoot it at 90° degrees, the observer outside the box sees a different angle, that's an effect called aberration of light. Nothing is in contrast with relativity, the speed of light is not affected by the motion of the box. You may say that its components change, that's true, but its speed is always c. | |
| Feb 20, 2017 at 9:06 | history | edited | DanielSank | CC BY-SA 3.0 |
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| Feb 20, 2017 at 8:45 | history | edited | Mathlover | CC BY-SA 3.0 |
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| Feb 20, 2017 at 8:39 | history | asked | Mathlover | CC BY-SA 3.0 |