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Replies: 3   Last Post: Mar 22, 2013 4:17 PM

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Pentcho Valev

Posts: 6,212
Registered: 12/13/04
Posted: Mar 22, 2013 4:17 PM
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"In an attempt to squash a bug in a 1 cm deep hole, a rivet is used. But the rivet is only 0.8 cm long so it cannot reach the bug. (...) The end of the rivet hits the bottom of the hole before the head of the rivet hits the wall. So it looks like the bug is squashed. (...) All this is nonsense from the bug's point of view. The rivet head hits the wall when the rivet end is just 0.35 cm down in the hole! The rivet doesn't get close to the bug."

So, from the bug's point of view, as the rivet head hits the wall, the rivet end is just 0.35 cm down in the 1 cm long hole - no life threat. The bug also knows that the rivet will eventually restore its proper length of 0.8 cm - no life threat again. But the bug is unaware of something extremely important - in Divine Albert's Divine Theory lengths vary arbitrarily so that Einsteinians can eternally sing "Divine Einstein" and "Yes we all believe in relativity, relativity, relativity". In this particular case the 0.8 cm rivet should become, for a while, 1 cm long, and the bug should be squashed. At that very moment the ecstasy gets uncontrollable - Einsteinians tumble to the floor, start tearing their clothes and go into convulsions.

More about LENGTH ELONGATION - the most glorious prediction of special relativity:
Brian Clegg: "Here's the scenario. We've got a table with a 10mm deep hole in it. At the bottom of the hole a beetle is happily beetling about, unaware that we are about to fire a rivet into the hole. The good news is that the shank of the rivet, the bit that will go into the hole, is only 8mm long, leaving room for our (rather small) beetle to feel safe and snug. (...) Let's follow the event from the beetle's viewpoint. Down comes the rivet and slams into the table. At the moment before the impact the rivet is still just 5mm long as far as the bug is concerned. But here's the thing. Just because the head of the rivet has come to a sudden stop doesn't mean the whole rivet does. A wave has to pass along the rivet to its end saying 'Stop!' The end of the rivet will just keep on going until this wave, typically travelling at the speed of sound, reaches it. That fast-moving end will crash into the beetle long before the wave arrives. It will then send a counter wave back up the rivet and after a degree of shuddering will eventually settle down as an 8 mm rivet in a 10 mm hole. Too late, though, for that bug. Isn't physics great?"
John de Pillis Professor of Mathematics: "In fact, special relativity requires that after collision, the rivet shank length increases beyond its at-rest length d."

Pentcho Valev

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