星際效應
Suppose that a father is 20.00 years older than his daughter. He wants to
travel outward from Earth for 2.000 years and then back for another 2.000
years (both intervals as he measures them) such that he is then 20.00 years
younger than his daughter. What constant speed parameter 刍=v/c (relative to
Earth) is required?
這有可能發生嗎
有沒有卦
對了讓本肥肥補自
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