Linked Questions
61 questions linked to/from Does a photon in vacuum have a rest frame?
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Is Lorentz transformation applicable of light itself?
I've just studied Einstein's Special Theory of Relativity and have followed most part of it. I was just wondering that whether the equations of Lorentz transformation are applicable on light? i.e. can ...
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Why is it more acceptable to assume that photons move at the universal speed limit instead of near it?
If both choices explain the same experimental observations, then the latter seems more reasonable. In the former case, the frame of reference of a photon would look like everything in the universe, ...
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Does a graviton in vacuum have a rest frame?
I have read these questions:
Does a photon in vacuum have a rest frame?
Based on dmckee's answer, the answer is no to a photon's rest frame.
In the modern view each particle has one and only one ...
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Does a photon also come to rest after some time while travelling through a medium?
If you fire a bullet in air, after some time it comes to rest because of air resistance forces. But what about photons? If they are also particles, then the same thing should happen with them. It ...
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Can light travel with a speed less than its speed at same time?
I know that the velocity of light with respect to anything is constant ($c$) . What, then, is velocity of light with respect to light?
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Difference between two massive particles approaching $c$ moving away from us and two photons doing the same
When two massive bodies move oppositely away from us, they can only approach the speed of light. Two photons, on the other hand, have the speed of light wrt to us. Although the situation of two ...
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3
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Problem on speed of light
As I was reading special relativity, my book says the speed of light is $c$ with respect to any other thing. Does that mean the speed of an individual photon is $c$ even with respect to another photon?...
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Photons and Relativity
Consider a Photon from Sun and travels with a velocity $c$. Now think we are that photon. For us, it looks like Sun is moving away from us with a velocity $c$. So, why don't we get attracted back ...
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Why does time stop its flow? [duplicate]
According to the "list verse" time gets to a pause when someone or something travels at the speed of light. But a question still lies in my mind, if time always travels forward and does not stop at ...
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Can a point in empty space be motionless with respect to light?
Being that the speed of light is constant throughout the universe, can a point in empty space be motionless with respect to light?
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Is speed essentially infinite for a massless object moving at $c$?
My current understanding of the topic does not allow me to answer this question.
Also, by 'object' I mean a theoretical massless macroscopic object (if we assume such an object is possible, and if ...
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How do electromagnetic waves/light travel at the speed of light?
When something reaches the speed of light, then time is said to stop, or at least is perceived to have stopped. The reason is that at that speed, the object become infinitely heavy and requires ...
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Lorentz transformation for length
It is known that $$x'=\gamma(x-Vt),$$
where $\gamma$ is the relativity multiplier. This equation means that $x'\to\infty$ if the frame is moving at the speed of light. Does this mean that if we treat ...
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What do you 'see' if you are stationary relative to a photon in a refractive medium?
A particle with zero rest energy/mass must always be at $c$ in all referentials, even why, if you could get to its referential it would have zero total energy, effectively not existing in that ...
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What would stationary light look like? [closed]
I mean, have we ever witnessed what we understand and call as light at rest, and what would it look like at rest?
