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The rod and the observer moves with velocity and w.r.t
S frame respectively. The relative velocity between them is
The length of the rod w.r.t observer,
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c23
c2
V = =c−2
3c
2
1− c. .23
c
21
c2
c4
= = 0.968l′ l0 1 − V 2
c2
− −−−−−√ l0
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We know,
Here
at
So ,
Now
Extracting u
we get,
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= Fdp
dt
p = F t + kp = 0
t = 0k = 0⇒ p = F t = mu
1− u2
c2√
⇒ F (1 − ) =t2 u2
c2 m2u2
u = Ftc
+m2 c2 F 2 t2√
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M + Δ
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M can be excited to a state of mass by photon
capture.
From momentum conservation,
From energy conservation
Squaring and rearranging, we get,
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M + Δ
0 + = phνc
M + hν =c2 (M + Δ +)2c4 p2C 4
− −−−−−−−−−−−−−−−√
ν =Δ(Δ+2M)c2
2Mh
Cloud
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