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Originally posted by muzzleflash
Of course the speed of light isn't constant.
How do you think it get's sucked into a black hole? It has to change it's speed flying outwards and turn inwards.
But however if we could observe light in a completely closed system perhaps it would maintain a consistent speed or behavior? I hate to refer to Newton and the First Law of Motion and the principal of inertia, but it was inevitable.
Originally posted by CasiusIgnoranze
reply to post by AnnoyingOrangeX
Can you please state your source?
In the most striking of the new experiments a pulse of light that enters a transparent chamber filled with specially prepared cesium gas is pushed to speeds of 300 times the normal speed of light. That is so fast that, under these peculiar circumstances, the main part of the pulse exits the far side of the chamber even before it enters at the near side.
Though declining to provide details of his paper because it is under review, Dr. Wang said: "Our light pulses can indeed be made to travel faster than c. This is a special property of light itself, which is different from a familiar object like a brick," since light is a wave with no mass. A brick could not travel so fast without creating truly big problems for physics, not to mention humanity as a whole.
Originally posted by JiggyPotamus
I am not really sure what is going on in this thread. It does not matter whether you are moving or not, at whatever speed, because the velocity of light remains the same regardless. Even during acceleration, although this introduces other problems, but nothing that is unexplainable in modern physics.
Einstein 1 You 0 --- Do you think that a century of physicists have been wrong? People smarter than you could ever dream of being? Where do people come up with this stuff?
Originally posted by CriticalCK
The speed of light appears to be fundamental for the universe. The law cannot be broken. Even space and time back down preventing this imperative to be violated.
"Professor Du's study demonstrates that a single photon, the fundamental quanta of light, also obeys the traffic law of the universe just like classical EM (electromagnetic) waves."
The possibility of time travel was raised 10 years ago when scientists discovered superluminal -- or faster-than-light -- propagation of optical pulses in some specific medium, the team said.
It was later found to be a visual effect, but researchers thought it might still be possible for a single photon to exceed light speed.
Du, however, believed Einstein was right and determined to end the debate by measuring the ultimate speed of a single photon, which had not been done before.