[題目] 兩個光子相撞
[領域] (題目相關領域)
普物
[來源] (課本習題、考古題、參考書...)
沒解答的考古題
[題目]
Imagine that we discover a new particle, called Q particle
by a head-on collision of two photons of energies 500 Mev and 200MeV.
The photons are annihilated in the process.
a) what is the mass of the newly discovered particle Q?
b) what is the kinetic energy of the Q particles produced in this reaction?
c) what is the momentum of the Q particles?
d) what si the velocity of the Q particles(magnitude and direction)
[瓶頸] (寫寫自己的想法，方便大家為你解答)
a) m = 1.24*10^-27 = 700 MeV/c^2
b) K = 700 MeV //這我有點不確定..
c) p = 300 MeV/c
d) 還在想...
b的部份讓我很困擾，不是所有的能量都拿來形成Q了嗎
不過能量守恆定律 K1 + K2 = Kf = 700 MeV
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 24.5.242.122
※ 編輯: andrenvq57 來自: 24.5.242.122 (10/14 13:03)
→
10/14 14:23, , 1F
10/14 14:23, 1F
所以我應該想成 K1 + K2 = E = K+Eo?
但 Eo = 700 MeV 的話 K =0, 然後 p= 0, v = 0?
※ 編輯: andrenvq57 來自: 24.5.242.122 (10/14 14:32)
→
10/14 14:34, , 2F
10/14 14:34, 2F
→
10/14 14:35, , 3F
10/14 14:35, 3F
→
10/14 23:47, , 4F
10/14 23:47, 4F
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