Sylvia Else ha scritto:
>> Before the departure, the two brothers agree that from the Earth,
>> every 10 years, the earth twin would send a flash to the spaceship.
>>
>> The traveling twin starts and half of his trip (after 5 years of his)
>> arrives next to the distant star around which he will turn to go back.
>>
>> For him, due to temporal dilation, on Earth, where time runs 8 times
>> slower, it has not even been a year and therefore it will have to pass
>> more than 9 earthy years before the first lightning starts.
>>
>> Then the spaceship rotates around the star and prepares for the last
>> 5 years of the return trip.
>>
>> If just before the turnaround, they were missing (on Earth) more than
>> 9 years after the first flash started, how many years are missing now
>> that the return has just started?
>>
>
> I don't know what you mean by "missing". The travelling twin will see
> all 8 flashes (the last being at the moment he arrives back home) on the
> journey back. None get lost.
(Non so cosa intendi con "scomparsa". Il gemello viaggiante vedrà tutti
8 lampi (l'ultima nel momento in cui arriva a casa) sul viaggio
indietro. Nessuno si perde).
Ho risposto...
Il gemello viaggiatore può vedere il primo lampo solo se esso è già
"partito".
Ebbene, nel riferimento del gemello viaggiatore, quando "parte" il
primo lampo?
Ripeto: "Parte" non "arriva".
(The traveling twin can see the first flash only if it is already
"started". Well, in the reference of the traveling twin, when "part"
the first flash? I repeat: "Part" does not "arrival").
--
Luigi Fortunati
Credere e' piu' facile che pensare
Believing is easier than thinking
Received on Mon Jul 24 2017 - 18:59:22 CEST