<div dir="auto"><div>Tom,</div><div dir="auto"><br></div><div dir="auto">I was really careful in wording this part, still it has created confusion. :)</div><div dir="auto"><br></div><div dir="auto">Our point of observation is earth (or say the solar system) and the 21st Century is the time (which is a also a function of the expanding volume of the universe). And the our devices of observation are made of earthly matter of electron, proton and neutron.</div><div dir="auto"><br></div><div dir="auto">So from this point of observatiom at this time if we observe using the instruments of earthly matter, I believe that we have reasonable evidence that speed of light is constant, and it has to be that value and no other value. And speed of light should be related to how the universe is evolving under these constraints.</div><div dir="auto"><br></div><div dir="auto">For observers beyond the aforesaid space, it can neither be proved or disproved , whether the speed is same. <span style="font-family:sans-serif">If large scale configuration of space ( i.e. distribution of mater and additional volume created) changes, which correspond to time change considerably, there are reasons to doubt whether speed of light will still remain constant even on earth. Furthermore, it is simply an overconfidence if we declare that instrument made from aforesaid earthly matter, can survive in other galaxies. But our scientific knowledge has not progressed enough to address these extended questions, so these are not so immediate concern. </span></div><div dir="auto"><span style="font-family:sans-serif"><br></span></div><div dir="auto"><span style="font-family:sans-serif">The question of immediate concern is that why should the earthly matter, located at earth in 21st century observe the speed of light as constant. Einstein told us the reason that time dilates and length contracts as we speed up. I may personally </span><span style="font-family:sans-serif">not believe in his explanation and I am sure that there are many other who also do not believe. Nevertheless, not believing is not enough, unless better explanations is produced and demonstrated through experiments. . </span></div><div dir="auto"><span style="font-family:sans-serif"><br></span></div><div dir="auto"><span style="font-family:sans-serif">Regards,</span></div><div dir="auto"><span style="font-family:sans-serif"><br></span></div><div dir="auto"><font face="sans-serif">Tufail Abbas</font></div><div dir="auto"><br><div class="gmail_quote" dir="auto"><div dir="ltr">On Wed, 28 Nov 2018, 22:33 <a href="mailto:carmam@tiscali.co.uk" rel="noreferrer noreferrer" target="_blank">carmam@tiscali.co.uk</a> <<a href="mailto:carmam@tiscali.co.uk" rel="noreferrer noreferrer" target="_blank">carmam@tiscali.co.uk</a> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Tufail, would you explain this please :- "<span style="font-family:Arial,Helvetica,sans-serif;font-size:12.8px">Speed of light </span><span style="text-decoration:underline">(as we observe at present moment/era)</span><span style="font-family:Arial,Helvetica,sans-serif;font-size:12.8px"> is so fundamental to the nature of reality , that without it space-time will cease to </span><span style="font-weight:bold">evolve and expand</span><span style="font-family:Arial,Helvetica,sans-serif;font-size:12.8px">, which becomes a motion-less Universe."</span><div>Do you mean the speed of light being the value that it is. and it has to be that value, or would any other constant speed do? Also do you mean c WRT all observers (which has not been proved, despite claims that it has), or c WRT its source .</div><div><br></div><div>Tom Hollings.</div><div><br>
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----Original Message----<br>
From: <a href="mailto:tufail.abbas@gmail.com" rel="noreferrer noreferrer noreferrer" target="_blank">tufail.abbas@gmail.com</a><br>
Date: 28/11/2018 16:12 <br>
To: "General Physics and Natural Philosophy discussion list"<<a href="mailto:physics@tuks.nl" rel="noreferrer noreferrer noreferrer" target="_blank">physics@tuks.nl</a>><br>
Subj: Re: [Physics] Physics Digest, Vol 19, Issue 5<br>
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<div dir="auto"><div dir="auto">Hello Doug,</div><div dir="auto"><br></div><div dir="auto">Thanks for those videos!!</div><div dir="auto"><br></div><div dir="auto">You did an interesting experiment, though I feel, that perhaps all cases are not discussed. </div><div dir="auto"><br></div><div dir="auto">I wonder if it would be beneficial to discuss those cases.</div><div dir="auto"><br></div><div dir="auto">I wonder what would happen if both magnet and disc are co-rotating but in opposite/ counter clockwise direction. Will it give a negative or positive voltage?.</div><div dir="auto"><br></div><div dir="auto">I wonder what would happen if position of magnet and disc is interchanged and all cases are repeated.</div><div dir="auto"><br></div><div>However I would like to clarify when I said that "it cannot be measured<span style="font-weight:bold">"</span>, I mean the <span style="font-weight:bold">absolute impossibility </span>of measuring/ detecting. Not that it is not measurable by using one method but possible to measure by using another method. </div><div dir="auto"><br></div><div dir="auto">Speed of light <span style="text-decoration:underline">(as we observe at present moment/era)</span> is so fundamental to the nature of reality , that without it space-time will cease to <span style="font-weight:bold">evolve and expand</span>, which becomes a motion-less Universe. </div><div dir="auto"><br></div><div dir="auto">Hence time (which is detected from motion) and space (which is measured only when time is available) are no more detectable, though they may exist as information/knowledge on <span style="font-weight:bold">landscape of all possibilities </span>untill such time Universe chooses to evolve in one way or the other with a particular reality.<span style="font-weight:bold"> </span>And landscape of all possibilities is not a physical object.</div><div dir="auto"><br></div><div dir="auto">Regards</div><div dir="auto"><br></div><div dir="auto">Tufail Abbas</div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr"><br></div></div></div></div>
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