All Questions
Tagged with faster-than-light velocity
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Faster than light is possible? [duplicate]
I know that some particles can go near or more than half the speed of light. So, say we shoot two particles in opposite directions at more than half the speed of light. Say one is moving at 50% the ...
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Lorentz transform causes Faster than light motion for Spacelike-separated object?
Consider a 5-meter rod which exists on the x-axis of a frame of reference:
Now consider an observer moving at a velocity $0.1c$ relative to this reference frame, from right to left. Their frame of ...
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If a photon travelled in the opposite direction of another photon [duplicate]
If a photon travels in the opposite direction as another photon, then what is the speed of the second photon relative to the first. Is it 2 times the speed of light? Also what if two photons travelled ...
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Special Relativity and Light [duplicate]
I just started learning about relativity in my physics class and would like some help understanding the concepts.
My question is imagine two objects start emitting light and are 1 lightyear away from ...
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But why can't i travel faster than the speed of light? [duplicate]
I'm laying in my bed right now. Am I traveling 0mph? Am I traveling 850-ish mph (south texas) as the earth rotates? Am I traveling 67,000mph as my planet orbits the sun? Am I traveling 560,000mph as ...
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Imaginary Lorentz factor in special relativity [duplicate]
This thing is making me confuse, what is mean by imaginary Lorentz factor in Physics? What is the physical meaning of imaginary?
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3
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Velocity addition for tachyons
How does the velocity of a tachyon transform under a Lorentz boost? Suppose we only consider motion along the $x$ direction for simplicity. If the velocity of the tachyon is $u$ in the lab frame, what ...
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Would it be possible to reach the speed of light using this example? [duplicate]
Let's say I were to have made a train that travels at $60$ $mph$. Let's also say that I have another train inside of the first train that is also moving at $60$ $mph$ in the same direction. So from an ...
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How is the acceleration faster than the speed of light? [closed]
The acceleration of a particle in an electric field given to me by a calculator is 175881998679 m/s squared - isnt that faster than light? How?
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Velocity of point of intersection of 2 rods [closed]
I'm not getting how are we getting u greater than c for part b by using formula for part a. Plz explain
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Speed of a train plus speed of light [duplicate]
Einstein postulates that the light travels at the same speed $c$ in every inertial frame of reference.
Now, if I'm within a train which goes right with velocity $V$ and throw a ball to the right with ...
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Why is my contrived superluminal thought experiment wrong?
An astronaut is on an odd mission. Each day, the spacecraft is accelerated by 10% of the speed of light, and at night the astronaut sleeps and will loose all memories of the previous day. Each day ...
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Observed Behavior of Light When Relative Motion $> c$
I am trying to wrap my head around some of the implications of relativity. Hopefully somebody can help enlighten me with a specific example I am wondering about:
We have 2 objects, A and B, that are ...
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If I'm moving at half the speed of light $c/2$, and another object with $c/2$ in the opposite direction, will I move with speed of light? [duplicate]
... c/2-(-c/2)=c relative to the other object? (title character limit)
Alternatively
If my speed is c/n to the object behind me, which also has c/n to the one behind it and so on I should have a ...
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2
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Breaking the light speed barrier [duplicate]
Assuing that our current understanding that the speed of light can't be matched or breached is correct, if you were travelling at the fastest possible speed in a space ship, say 99.99% of light speed, ...
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