狹義相對論問題(請用中文回答)20點

2010-02-24 2:06 am
兩架噴得機載着兩個非常精確的元子鐘飛上天,一架由東向西飛,和地球自轉的方向相反,另一架由西向東飛,正好和地球自轉的方向一樣,結果兩個原子鐘的時間都不同,跟一個實驗室的原子鐘比較,時間有微少的差異 (內容取自物理早自習by 阿札羅夫,字眼有少許更改)
為何原子鐘的時間有差異?(請詳細回答)
更新1:

應該係3個鐘作比較

回答 (3)

2010-02-24 5:42 pm
✔ 最佳答案
Let v1, v2 be the velocities of the jets relative to the ground, and c be the speed of light. A moving clock runs slower than a stationary one. And they are related by time dilation formula
T = t / Sqrt(1 - v^2/c^2)

1.
When observed on the ground,
let t be a time interval of the ground clock, T1 and T2 be the time intervals of the jets.
T1 = t / Sqrt( 1 - v1^2/c^2 )
T2 = t / Sqrt( 1 - v2^2/c^2 )

2.
When observed in one of the jets, say the 1st one,
velocity of the ground = v1
velocity of the 2nd jet = u = (v1 + v2) / (1 + v1v2/c^2)

Let t1 be the time interval observed in jet 1. Let T and T2 be time intervals on the clocks on the ground and jet 2.
T = t1 / Sqrt( 1 - v1^2/c^2 )
T2 = t1 / Sqrt( 1 - u^2/c^2 )
2010-02-24 6:37 pm
The crucial point is that the observed phenomenon is called "time dilation", whcih is a result of the constant speed of light to eah observer irrespective they are at rest or moving at a uniform speed. The "constant speed of time" is one of the postulates upon which the Theory of Special Relativity is built up.
2010-02-24 3:35 am
是不是兩個原子鐘各自比較?
還是與地面的鐘作比較?
我想這和地球自轉無關, 只考慮兩個鐘的相對運動


收錄日期: 2021-04-29 17:38:30
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