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Post by Marie Griffiths on Feb 15, 2021 13:53:48 GMT
Maybe, perhaps, maybe. :-)
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Post by richardwoods on Feb 15, 2021 16:29:38 GMT
🤣🤣🤣🤣🤣🤣
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Post by stevehoare61 on Feb 15, 2021 20:02:38 GMT
weird....so this is what the Nanobots do in the Covid injections then....Creepy....
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Post by Marie Griffiths on Feb 15, 2021 23:51:49 GMT
weird....so this is what the Nanobots do in the Covid injections then....Creepy.... No that's the Siluruans
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Post by Marie Griffiths on Feb 18, 2021 16:31:10 GMT
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Post by garyb on Feb 18, 2021 23:21:03 GMT
While we're on the subject of far-out methods of retrieving missing episodes...
What are the chances, assuming the development of faster-than-light technology, of catching up with the original transmissions and re-recording them in deep space? I seem to recall the storyline of Carl Sagan's 'Contact' included an extraterrestrial civilisation sending back TV material broadcast from a 1930s Olympics in Germany. I would have thought such signals would be become too weak to have made this possible, but if it's good enough for Carl...
Admittedly, if the discovery of faster-than-light travel ever becomes a reality, the filling in of the BBC archive might not be the single most exciting practical application...but enquiring minds want to know!
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Post by A Barron on Feb 18, 2021 23:29:51 GMT
What are the chances, assuming the development of faster-than-light technology, of catching up with the original transmissions and re-recording them in deep space? I believe Brian Cox said something about this in The Science of Doctor Who, although I believe his point was that aliens could watch it rather than we catch up to it and record it.
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Ace St.John
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Posts: 139
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Post by Ace St.John on Feb 19, 2021 3:51:34 GMT
What are the chances, assuming the development of faster-than-light technology, of catching up with the original transmissions and re-recording them in deep space? I believe Brian Cox said something about this in The Science of Doctor Who, although I believe his point was that aliens could watch it rather than we catch up to it and record it. Would they be heading in deep space tho? And if so in what direction. . And does the signal become weaker? Or would they have just bounced around inside the stratosphere after transmission? ?? The physics would be good to know in lay terms
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Post by A Barron on Feb 19, 2021 8:07:21 GMT
I believe Brian Cox said something about this in The Science of Doctor Who, although I believe his point was that aliens could watch it rather than we catch up to it and record it. Would they be heading in deep space tho? And if so in what direction. . And does the signal become weaker? Or would they have just bounced around inside the stratosphere after transmission? ?? The physics would be good to know in lay terms The signal did escape in all directions. Here is a video about it: www.youtube.com/watch?v=RMVO_UmReTo
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Post by RossL on Feb 20, 2021 23:53:08 GMT
Would they be heading in deep space tho? And if so in what direction. . And does the signal become weaker? Or would they have just bounced around inside the stratosphere after transmission? ?? The physics would be good to know in lay terms The signal did escape in all directions. Here is a video about it: www.youtube.com/watch?v=RMVO_UmReToThe signal strength decreases by the square of the distance, known as the inverse square law. So if the distance double the power decreases by 4 times. Seeing as the transmitters fired the majority of the signals at the horizon, not into space and the 1960s vhf frequencies would tend to refract off the ionosphere back towards the earth and not pass through it the amount of signal leakage in the first place would be miniscule. Add in the inverse square law and the whole idea of recording or watching any lost tv from a deep space location is just sci fi. The mid-late 60s lost Dr Whos are 50+ light years out in space now - thats well out into the nearest stars. The signal strengths of the tv signals are going to be insignificant against the general background radiation..
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Post by John Wall on Feb 21, 2021 13:29:10 GMT
Yep, pretty standard science.
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Post by richardwoods on Feb 21, 2021 13:57:14 GMT
Although correct it doesn’t give the full picture.
The lower Band 1 frequencies that were used for VHF 405 line transmission have much greater reach than conventional broadcasts. Just look at the reception of relatively low power transmissions of pre war TV broadcast from Alexandra Palace in America.
We are, I guess talking about reception by an alien civilisation via huge movable radio telescopes or their equivalent which is perfectly possible.
The later high power channel 1 and channel 5 transmissions from Crystal Palace & Sutton Coldfield to name just 2 could probably be received & decoded at great distance, just look at the reception of the low power signals from the Voyager & new horizon spacecraft from the far reaches of the solar system, (25 watts from Voyager vs up to 1,000,000 watts for example from Elmley Moor in Yorkshire), and the recent SETI signal received from the rough direction of Proxima Centauri which could clearly be seen to be a non modulated tone.
The signal that really does go & go is the Radio 4 long wave broadcast from Droitwich. The AM ground wave is used on long wave for terrestrial reception, (in 2000 I was listening to PM on Radio 4 in Essouria, Morocco), the space wave on long wave does what it says & goes off into space. So unlikely as it sounds, our first contact could be facilitated by the Archers!
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Post by richardwoods on Feb 21, 2021 13:58:35 GMT
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Post by richardwoods on Feb 21, 2021 13:59:37 GMT
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Post by richardwoods on Feb 21, 2021 14:01:16 GMT
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