Explaining time dilation from length contraction easierby digi99 Tags: contraction, dilation, easier, explaining, length, time 

#1
Feb1112, 11:26 PM

P: 183

For the explanation of the Lorentz derivation in Wiki with the known triangle, 2 rest frames are considered in 1 view, so that's not forbidden. So I do too.
To explain time dilation is easier to understand if you see it by length contraction. That could be explained somehow in the future, because length is real to understand ... If you P move with speed V in rest frame A, somebody in rest frame A takes your time t between a start and endpoint (distance X m). P takes his rolling ruler with him and a clock (in rest frame B), and stops the clock after distance X (for him). His clock (smaller) had stopped after 1/γ . X m. So there is nothing special about time because his clock stopped after 1/γ . t, it's just the difference in equal moments, that must be corrected in calculations. Maybe I say it too simple as I did many times before ... 



#2
Feb1612, 07:40 PM

P: 183

Suddenly I begin it to understand Relativity, it goes about Simultaneity.
So one considers the moments t in frame A en 1/γ . t simultaneously because of the length contraction from our unit meter in frame A. So in the old meter the car is on t in frame A and with the new smaller unit meter (1/γ) the car is in frame A on 1/γ . t (but also in frame B where the car is standing still). So duration is everywhere the same, there is nothing strange about time in the SR, I have not read GR so maybe there is something different in duration ? Right ? It's just the length contraction ! If this is true I can't understand why I have not understand this in books all that time ... on my own website I can sure explain this more simple than, if this is right ? 



#3
Feb1612, 10:26 PM

PF Gold
P: 4,526

The length contraction occurs only along the direction of motion and yet there is time dilation for a light clock where the light bounces back and forth at right angles to the direction of motion. When you rotate the light clock so that the light bounces back and forth along the direction of motion, the mirrors have to come closer together in order to tick at the same rate. So it cannot just be the length contraction, can it?
This topic recently came up in another thread called Conflicting clocks. Why don't you take a look at that thread and see if it makes sense to you? 



#4
Feb1612, 10:58 PM

P: 183

Explaining time dilation from length contraction easierYes you mean the known triangle for the short Lorentz derivation. But I have problems with this situation, of course it can be true and than I should understand, but that's the point. I would like to believe in time dilation and should be really interesting for me, but I am not that far ... I mentioned this in my first blog last alinea's, maybe you would have a good answer it helps me .. it is after the second last "====================" .. 



#5
Feb1712, 10:08 AM

PF Gold
P: 4,526

Why should I pursue this any farther on your blog when you reject what I'm offering here? I get the impression you didn't even read my post. You didn't respond to anything I said. I didn't say anything about Lorentz derivation. You always want to reject the simple explanations and come up with your own.
Please answer my question in the previous post: how can you explain time dilation as being nothing more than length contraction when length contraction only applies along the direction of motion whereas time dilation applies without regard to the direction of motion? 



#6
Feb1712, 10:26 PM

P: 183

Thanks for the answer, interesting. Sorry for that, but it was a quick answer for me, I had to go sleeping. Now again, so I wanted always answer later. But I can already give a quick answer (I come back later on it in the weekend). Your situation is mine with the car but with light in an angel right on the car's top. If I don't believe in time dilation there is nothing special for me in your example. In both cases the clock has the same rate but specifies a different time because its light path is shorter. But you can also ask, why can I explain in the moving direction with length contraction and so a shorter meter (1/γ) the same time 1/γ.t with and without time dilation (Lorentz) ? Just as you always say "you need a clock to measure time", so I say "you need a ruler to measure a distance" ... I go also to look to your other example later .. 



#7
Feb1812, 03:17 AM

PF Gold
P: 4,526

Why don't you start with his 1905 paper introducing Special Relativity? In section 1, you will see where he talked about defining distance with a rigid ruler: I really don't want to discuss your personal ideas about these things but I would be happy to help you understand what Einstein said about them. Do you want to give up on trying to explain these things better than Einstein did and learn what he had to say? 



#8
Feb1912, 02:14 PM

P: 183

Thanks for the answers Ghwellsjr.
I answered to quick last time, and removed that answer, so now I take the time for it, it needed for this subject. I realise already that I gave the wrong answer, it is what you said, when a shorter distance it will bounce more rapidly. I proved in my blogs that I did understand this already. Somewhere I am more happy now because I understand time dilation completely in the moving direction, I had a wrong understanding from time dilation since the beginning, that's when you learn it on your own. There is no different duration, in the moving direction it's takes just lesser time because the unit meter is smaller (all objects are smaller in length). It are the times where my car is in frame A and B because of a different unit meter, the difference (1  1/γ) is the time you "loose", so no secret at all anymore. Its just the path of a light wave because of the smaller length. In fact I saw it from the beginning right (you know my first topic) where I said consider light as the time (there I started my interest with my idea to see if I was right), I mean now see it as the constant ration C (distance / time) presented by light in space but not on earth (than it is just that ration C). That this ration C is always constant (measured when you move) is no surprise for me (I said so in my blog) and can understand that very well. In this way I can indeed it explain very simple on my website, more than I already have done. I find this all very bad explained in books generally, in fact it is easy and logically. Average people don't need to know all details, but slower gong time is difficult for people while it is not. I did try this out on my sister and she understand it now easily. I analysed this now to the bottom for myself on my own. BUT like you said, in other directions you have also the same time dilation seen from my car in frame B. And in this other directions the unit meter is equal as in frame A, where lies the border of length contraction ... This can mean for me: 1) there is no time dilation, it is just the ration C again, and so time is not different (because the unit meter is as in frame A, no length contraction) 2) there is length contraction in all directions (as I suggest in my blog) and can be the reason if there is really time dilation as well I am curious what you think, why could one it easily explain in the moving direction and why would it be mysterious in other directions ? Not all have to be right what Einstein says, extended theories will be possible in the future. In my blogs it are only my ideas, I have not read all of Einstein, it is just an idea, we will see in the future what will be the right explanation, but I guess never mysteries ... maybe Lorentz is a start maybe there is another formula closer to the truth ... 



#9
Feb2112, 01:10 AM

P: 183

But in my new thoughts that all have to go smaller, a light wave's amplitude too (or another electromagnetic wave), otherwise its amplitude is not in ration and that's not logically. If it is in only one direction, length contraction, the amplitude have not be changed from a light wave in the same direction. 



#10
Feb2212, 04:47 PM

P: 183




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