All Questions
6 questions
2
votes
2
answers
284
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Acceleration without a force in special relativity
Let us consider a relativistic particle of mass $m$ and charge $q$ in a constant electric field $\mathbf{E}=E\mathbf{\hat{j}}$ moving in two spatial dimensions, a relativistic extension of the well-...
- 1,112
3
votes
0
answers
62
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Why does the photon in Compton Scattering have a minimum frequency/maximum wavelenght?
Using conservation of four-momentum one finds that, with respect to the angle of deviation of the photon from its original direction $\theta$, the wavelength and frequency of the emitted photon are:
$
...
- 423
1
vote
3
answers
3k
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How to prove the relativistic momentum? [duplicate]
As far as I know, the relativistic momentum of a particle is given by the equation: $$p=\frac{m_0v}{\sqrt{1-\frac{v^2}{c^2}}}$$
where $m_0$ is the mass of the particle and $v$ is the velocity of the ...
- 11
1
vote
1
answer
1k
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Calculating an "apparent" speed of a beam in a medium
While thinking about relativity, one question sparked my curiosity. If we could observe the trajectory of a light beam by using some partially opaque medium, like smoke, to make it visible, we'd not ...
- 87
7
votes
4
answers
3k
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Is there a formula that gives the position of an object depending on the time, but which doesn't allow the object to surpass the speed of light?
I have found these two formulas:
$v = at + v_0$
$x = \frac{1}{2}at^2 + v_0t + x_0$
a is the acceleration
v is the velocity
x is the position
t is the time
$v_0$ is the initial velocity
$x_0$ is the ...
- 1,643
0
votes
2
answers
212
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Query into the cumulative velocity of mounted platforms
Consider throwing a stone at an object from rest, it travels at Vms-1. Now throw that stone whilst running at Ums-1. It seems in the latter scenario the total speed of stone is V + U. Now imagine ...
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