0 Members and 1 Guest are viewing this topic.

Sure photons don't actually experience time. Only people capable of computing it.But if you can put a stone traveling at the speed of light it will advance in time in relation to a stone at rest, even if none experience time.My question is how much time will the photon advance in the 8 minutes.What do you mean time would be slower?

The higher the gravity, the faster the speed, the slower time advances. That's why the observer in normal gravity at rest can age thousands of years in what would be minutes for the person standing at the event horizon of a black hole. Time goes slower for them relative to the observer at rest at normal gravity. In the time it took thousands of years to go by, only minutes or hours or days went by for that at the black hole. Time was slower for them.

A photon has zero mass so it would take 8 minutes to travel from the sun to the earth.A large gravity field between the earth and the sun might effect the time taken to a minuscule degree. Light can have momentum but not mass?

Quote from: Alan McDougall on 20/06/2016 11:06:29A photon has zero mass so it would take 8 minutes to travel from the sun to the earth.A large gravity field between the earth and the sun might effect the time taken to a minuscule degree. Light can have momentum but not mass?I believe the OP is talking about the time dilation the photon would experience from its own perspective, not simply a question of "how long does it take light from the sun to reach earth?". I base that off the very questions he asked in the OP and how he stated them.And at its most basic, that photon would experience having crossed no distance, and it would've experienced no passing of time. From the photon's perspective, the journey was actually instantaneous.

Quote from: IAMREALITY on 19/06/2016 23:53:24The higher the gravity, the faster the speed, the slower time advances. That's why the observer in normal gravity at rest can age thousands of years in what would be minutes for the person standing at the event horizon of a black hole. Time goes slower for them relative to the observer at rest at normal gravity. In the time it took thousands of years to go by, only minutes or hours or days went by for that at the black hole. Time was slower for them. Imagine a satellite orbiting a black hole near event horizon. To get stable orbital trajectory, it has to move at nearly the light speed.But it will make it experience micro gravity, considering what happens to people in ISS.The question is, what cause time dilation of a clock inside the satellite, is it the gravity field, the movement speed, or both? (or none?)What if the satellite is not moving relative to the black hole nor an external observer, by canceling force of gravity using some kind of propeller?

Once at the speed of light time passes very much faster than at a slower speed:One photon that leaves the sun now, how much time did pass for the photon, when at our time it reaches the Earth 8 minutes later? [xx(]

That time runs slower for a black hole is purely conjecture.

Quote from: kasparovitch on 19/06/2016 12:28:28Once at the speed of light time passes very much faster than at a slower speed:One photon that leaves the sun now, how much time did pass for the photon, when at our time it reaches the Earth 8 minutes later? [xx(]It's not meaningful to speak of the time passing for a photon so your question has no meaningful answer

I'm sorry Colin. There 'is' no New Theory here... Just General Relativity concerning what is proven and what is not... If we can't talk about what is proven and what is not concerning General Relativity, this then renders the physics board as a farce and General Relativity as a 'religion'.

However, an observer seeing it travel at near light speed would say it is ticking more slowly.