Friday 23 December 2011

Length contraction and Time dilation

Length Contraction and Time Dilation

The first thing to say is that these two phenomenon do occur; yet not, in any way, as described by the current scientific gobbledygook.

Bodies in motion do not become physically shorter, nor does time run at a different speed!

As a body moves faster relative to an observer the absolute length (unit size x unit quantity, the magnitude), does not change. The units of that measurement do change however, the faster it goes the smaller the measured units become, yet as they become smaller their quantity increases in proportion to maintain that absolute length.

Time is similarly affected.

Current Relativity tells us that when two bodies have a relative velocity that is approaching the speed of light, their lengths will be contracted to near zero, in the direction of their travel. That this is a genuine, real reduction in their lengths, yet one that can only be measured by from the other body!

Pardon me! But what absolute nonsense! Surely it is not difficult to work out that this has to be that the measurements are what have been affected not what they are measuring?

And a second point that I have to make here; if a body has a number of other bodies moving at different speeds it will have to have a different actual physical length according to measurements taken from each of those bodies! Many different lengths! At the same time!

Ah but no! I have been told! That is because each of those bodies own measures change, which is why one body has different lengths as measured from each body moving at a different speed!

Seems very similar to the ouzelum bird!

These effects depend solely on the observer's perspective. And only when the moving frames coordinates are transformed and plotted onto resting Frame of Reference's coordinates. i.e. Only when the measurements from the moving frame are used.

But if the observer in the resting frame were to make his own measurements with his own 'rulers' and 'clocks' would he still observe dilation or contraction.

Let me demonstrate with a simple thought experiment:

Two observer's at A and B, 1 light year apart with synchronised clocks.
A space ship passes from A to B at 0.5c.

Space ship —————————————————————————————————>
A < - - - 1 light year - - - > B

Fig. 7


A and B record the time when the space ship passes them:
How long is their time interval?
Simple arithmetic tells us! 1 light year at 0.5c will take 2 years as measured on the stationary observers own standard clocks and rulers.

How long does is it for an observer on the ship?
Just the same, 2 years as all the measurements are local.

Summary

The important thing to be assured of here is that time dilation and length contraction only occur when the moving observer's measurements have to be transformed to give the stationary body the measurements it would have had if it had measured them using the moving body's own rulers and clocks at their relative velocity and vice versa.