@wolfgang59 saidPeople often think they know what they will do tomorrow. They have plans and think nothing can change them. Nobody knows that with certainty though. We know probabilities, but never certainties.
I don't think Heisenberg's Uncertainty Principle involves the future.
It just states that one cannot know both the
position and velocity of a particle at any moment.
A photon can travel millions of light years before it reaches it's destination, but as far as the photon is concerned it arrived as soon as it left. It has infinite mass.
If you could measure the position and velocity of the photon you can tell where it will reach it's destination with certainty. Like a prediction of the future you can only know the probabilities, never certainty.
@wolfgang59 saidMeasuring the position and velocity of a photon is sort of like looking into the future. The photon already knows the future since time does not pass for the photon. Knowing the position and velocity is like peeking into the future. That is why knowing both results in uncertainty. You are not allowed to peek into the future.
@Metal-Brain
Smoking?
@wolfgang59 saidMore accurately, it states that particles do not have a well-defined position or momentum, not just that it cannot be precisely known.
I don't think Heisenberg's Uncertainty Principle involves the future.
It just states that one cannot know both the
position and velocity of a particle at any moment.
@kazetnagorra saidUp to a point, Heisenberg's Uncertainty Principle relates to the results of measurements, and reflected the state of understanding of mechanics at very short distance scales at the time. Your statement, while true about our current understanding of quantum mechanics, didn't apply then, they hadn't worked it out at that time.
More accurately, it states that particles do not have a well-defined position or momentum, not just that it cannot be precisely known.
As an aside, note that energy time uncertainty relates the uncertainty in the time an event happened, say an atomic transition, to the uncertainty (variance) of the energy of the emitted photon. It most certainly does not invalidate the entire concept of time as @ogb seemed to think in his OP.
@metal-brain saidWhere did you get the idea photon's have infinite mass? If they did, they would be bigger than the entire universe.
People often think they know what they will do tomorrow. They have plans and think nothing can change them. Nobody knows that with certainty though. We know probabilities, but never certainties.
A photon can travel millions of light years before it reaches it's destination, but as far as the photon is concerned it arrived as soon as it left. It has infinite mass.
If yo ...[text shortened]... ith certainty. Like a prediction of the future you can only know the probabilities, never certainty.
@metal-brain saidNo it isn't.
Measuring the position and velocity of a photon is sort of like looking into the future.
@ogb saidThe "concept" was metal-brain's.
@wolfgang59
interesting concept..can you expand on it a bit ? TY
He should explain it.
@metal-brain saidIt isn't.
Well that's that then. I didn't know nay saying was a concept.
Only your mate thinks that.
@wolfgang59 saidI explained it and you know it. You rejected my explanation is all. I didn't know the word "no" was a concept.
The "concept" was metal-brain's.
He should explain it.
@metal-brain saidHard to understand how you would say it has infinite mass, relativistic or otherwise. Photons impart momentum to mass it hits and that is the only relevance to mass, which is the ability to impart momentum when hitting something of mass.
Relativistic mass.
I noticed that some physicists reject relativistic mass altogether though. Maybe I should create a thread about it.
@metal-brain saidYou wrote
I explained it and you know it. You rejected my explanation is all. I didn't know the word "no" was a concept.
... The photon already knows the future ....
You call that an explanation?