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Why Relativity Exists

September 12 2017 at 5:23 PM
roger 

 
Why Relativity Exists
April 28, 2016 Kenneth Chan


This paper provides the reason for the existence of relativity that Einstein himself never realised. In the theory of relativity, time and space distort depending on our state of motion, while the speed of light always remains constant. Einstein considered the constancy of the speed of light as a postulate that cannot be explained.

This so-called postulate, however, is actually not a fundamental law of nature because there is an underlying explanation for it: We perceive the speed of light to be constant because the physiological functioning of our body (including our brain) depends on the speed of electromagnetic transmission (which is the speed of light), and we have defined our time according to how we physiologically experience it. We have thus effectively used the speed of light as the standard for defining our time, and that is why the speed of light is always constant according to our time.
http://kenneth-chan.com/physics/why-relativity-exists/

 
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Anonymous

Re: Why Relativity Exists

September 13 2017, 1:05 AM 

Yes, if the medical doctor says it, it must be true. I am sure that if you need your appendix removed, you will turn to a physicist.

 
 
Johannes Harder Andersen

Re: Why Relativity Exists

September 14 2017, 3:05 PM 

It is easy to measure the speed of light. I did that in a high school physics experiment. Not by using indirect computer equipment which is primed with the answer. I did it using a rotating mirror, the traditional way.

 
 
jaquecusto

Re: Why Relativity Exists

September 16 2017, 8:15 AM 

>>> Einstein considered the constancy of the speed of light as a postulate that cannot be explained.

Then, no one can says that understands relativity...

 
 
jaquecusto

Re: Why Relativity Exists

September 16 2017, 8:28 AM 

>>>This so-called postulate, however, is actually not a fundamental law of nature because there is an underlying explanation for it: We perceive the speed of light to be constant because the physiological functioning of our body (including our brain) depends on the speed of electromagnetic transmission (which is the speed of light), and we have defined our time according to how we physiologically experience it.


It is not possible to prove, it nor can it be denied. It can be summed up as a simple matter of belief or faith.



 
 
Johannes Harder Andersen

Re: Why Relativity Exists

September 16 2017, 9:38 AM 

So much of our daily life depends on the exact value of c. The antennas, the radar, all kinds of communication. And there are no counter examples. The speed of light through media e.g. glass, is not reduced but appear slow because of interruptions.

 
 
roger

Re: Why Relativity Exists

September 16 2017, 9:59 AM 

>>>The speed of light through media e.g. glass, is not reduced but appear slow because of interruptions.

just playing around with words when they say speed of light c is meant to be speed of light in vacuum, and that speed of propagation of light through different media is less than c.

The velocity factor (VF), also called wave propagation speed or velocity of propagation (VoP or v P , of a transmission medium is the ratio of the speed at which a wavefront (of an acoustic signal, for example, or an electromagnetic signal, a radio signal, a light pulse in an optical fibre or a change of the electrical voltage on a copper wire) passes through the medium, to the speed of light in a vacuum.
https://en.wikipedia.org/wiki/Velocity_factor



 
 
roger

Re: Why Relativity Exists

September 16 2017, 10:02 AM 

VF equals the reciprocal of the square root of the dielectric constant (relative permittivity), κ , of the material through which the signal passes:

V F = 1 / κ

The VF of a lossless transmission line is given by:

V F = 1 /( c sqrt(L C))

where L is the distributed inductance (in henries per unit length), C is the capacitance between the two conductors (in farads per unit length), and c is the speed of light in vacuum.
https://en.wikipedia.org/wiki/Velocity_factor

 
 
Johannes Harder Andersen

Re: Why Relativity Exists

September 16 2017, 10:58 AM 

Yeah, but...

A medium is basically a vacuum with some atoms inserted in between. Light goes through this vacuum (in the medium) and hits an atom, which then absorbs (destroys) the photon, but after a short while re-transmits another but similar light photon. This interruption pause in the transmission is then perceived as a slow down of light in the medium.

 
 
roger

Re: Why Relativity Exists

September 16 2017, 11:08 AM 

what you are talking about is now a quantum effect, and special relativity ignores quantum physics as I note in one of my talks

 
 
 
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