- #1
Muthumanimaran
- 81
- 2
As we know light travels very very large distances from far far away galaxy reaches our eyes, why it is timeless, I mean particles like muon disintegrates in time but photon does not why?
So, yes, that. But also there is length contraction. So despite the particle standing still in time, it has no distance to travel... I may be misunderstanding this horribly.BiGyElLoWhAt said:If something moves at the speed of light, it has infinite time dilation, and doesn't see time.
Ooo, good point.sophiecentaur said:The problem is that, when you are trying to take your reference frame as one that is traveling at c (relative to what?), any conclusions that your reasoning might produce are likely to be suspect.
Trying to characterise a quantum particle in classical terms is doomed, I think.
HAHA. No one ever said this was going to be easy.Physicsphysics said:Ooo, good point.
Muthumanimaran said:As we know light travels very very large distances from far far away galaxy reaches our eyes, why it is timeless, I mean particles like muon disintegrates in time but photon does not why?
Muthumanimaran said:As we know light travels very very large distances from far far away galaxy reaches our eyes, why it is timeless
BiGyElLoWhAt said:If something moves at the speed of light, it has infinite time dilation, and doesn't see time.
sophiecentaur said:The problem is that, when you are trying to take your reference frame as one that is traveling at c (relative to what?), any conclusions that your reasoning might produce are likely to be suspect.
I'm a little confused by this explanation, because the energy of a photon is observer-dependent. What one observer describes as a high-energy gamma ray could be described by another observer as a low-energy ultra-low frequency radio wave (due to doppler shift). When you say "decay", do you really mean "collide with another photon"?PeterDonis said:So for a photon to decay into something else, the something else would have to have less energy than the photon. But unless the photon is extremely energetic, such as a gamma ray from a nuclear reaction, there won't be anything else with less energy that it can decay into. Sufficiently energetic photons, like those produced in reactors or particle accelerators, can in fact "decay" into electron-positron pairs (it has to be a pair so that charge is conserved). But photons of visible light have far too little energy to decay into anything else.
DrGreg said:I'm a little confused by this explanation, because the energy of a photon is observer-dependent. What one observer describes as a high-energy gamma ray could be described by another observer as a low-energy ultra-low frequency radio wave (due to doppler shift). When you say "decay", do you really mean "collide with another photon"?
Phynos said:I was also confused by this part. How can we discriminate between low and high energy photons when talking about pair production when being low or high energy depends on our frame of reference? Is it the energy of the photon in the frame of reference in which it was emitted that actually matters?
DrGreg said:I'm a little confused by this explanation, because the energy of a photon is observer-dependent.
Pramod Pandya said:Mass implies inertia for motion - since the rest mass of photon is zero - it does not have inertia
Photons are considered timeless because they do not experience time in the same way that humans do. This is because photons are massless particles that travel at the speed of light, which is the maximum speed allowed in the universe. As a result, they do not experience the passage of time and can be thought of as frozen in time.
The speed of light, which is approximately 299,792,458 meters per second, is a constant in the universe. According to Einstein's theory of relativity, the closer an object travels to the speed of light, the slower time moves for that object. Since photons travel at the speed of light, time does not pass for them, making them timeless.
Time and the movement of photons are closely linked. As photons travel at the speed of light, they do not experience time. However, for an observer, time appears to slow down as the speed of light is approached. This is known as time dilation and is a fundamental concept in Einstein's theory of relativity.
No, photons can never experience time. This is because they are massless particles that travel at the speed of light, which is the maximum speed allowed in the universe. As a result, they are frozen in time and will continue to travel at the speed of light until they are absorbed or interact with other particles.
The concept of timelessness for photons has significant implications for our understanding of the universe. It challenges our traditional understanding of time as a linear progression and highlights the interconnectedness of space and time. It also plays a crucial role in fields such as astrophysics and quantum mechanics, as it helps us understand the behavior of particles at the speed of light and the fundamental laws of the universe.