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TWIN PARADOX OR TWIN ABSURDITY?
http://homepage.ntlworld.com/academ/...elativity.html
"A more intriguing instance of this so-called 'time dilation' is the well-known 'twin paradox', where one of two twins goes for a journey and returns to find himself younger than his brother who remained behind. This case allows more scope for muddled thinking because acceleration can be brought into the discussion. Einstein maintained the greater youthfulness of the travelling twin, and admitted that it contradicts the principle of relativity, saying that acceleration must be the cause (Einstein 1918). In this he has been followed by relativists in a long controversy in many journals, much of which ably sustains the character of earlier speculations which Born describes as "monstrous" (Born 1956). Surely there are three conclusive reasons why acceleration can have nothing to do with the time dilation calculated: (i) By taking a sufficiently long journey the effects of acceleration at the start, turn-round and end could be made negligible compared with the uniform velocity time dilation which is proportional to the duration of the journey. (ii) If there is no uniform time dilation, and the effect, if any, is due to acceleration, then the use of a formula depending only on the steady velocity and its duration cannot be justified. (iii) There is, in principle, no need for acceleration. Twin A can get his velocity V before synchronizing his clock with that of twin B as he passes. He need not turn round: he could be passed by C who has a velocity V in the opposite direction, and who adjusts his clock to that of A as he passes. When C later passes B they can compare clock readings. As far as the theoretical experiment is concerned, C's clock can be considered to be A's clock returning without acceleration since, by hypothesis, all the clocks have the same rate when at rest together and change with motion in the same way independently of direction. [fn. I am indebted to Lord Halsbury for pointing this out to me.] (...) The three examples which have been dealt with above show clearly that the difficulties are not paradoxes) but genuine contradictions which follow inevitably from the principle of relativity and the physical interpretations of the Lorentz transformations. The special theory of relativity is therefore untenable as a physical theory." The following scenario will show that the travelling twin will find himself OLDER than his brother who remained behind. A long rocket passes the twin at rest, and the rocket is so long that the twin at rest will see it passing by all along. According to Einstein's special relativity, observers in the rocket see their clocks running faster than the twin at rest's clock, that is, observers in the rocket age faster than the twin at rest. At some initial moment the travelling twin, standing so far next to his brother, jumps into the rocket, joins the observers there and starts, just like them, aging faster than the twin at rest. Later the rocket stops and immediately starts moving in the opposite direction. Again, according to Einstein's special relativity, observers in the rocket, including the travelling twin, age faster than the twin at rest. Finally the travelling twin jumps out of the rocket and rejoins his brother at rest. Who is older? Pentcho Valev |
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