Does time exist?
- Thread starter Asexperia
- Start date
- Status
DaveC426913
Valued Senior Member
Oxymoron.
Natural Selection is about experience , by living things , in the real physical Universe ,
What talking has circled ?
Write4U
Valued Senior Member
Ok, then chew on this;
Is the Universe Made of Math? [Excerpt]
https://www.scientificamerican.com/article/is-the-universe-made-of-math-excerpt/
I'm done here, I've made my case on Time as a mathematical property of Mathematical Spacetime.
But not something real .
announcements here, time is real...it's as real as space is, and as real as spacetime is. The proof of this is of course space and time being interchangeable and literally two sides of the same coin, but this is above river.
Asexperia
Registered Senior Member
What case can we interchange time and space in?
Space and time are both variable qualities within SR, but a good question, and the following describes it far better then I...
https://www.physicsoftheuniverse.com/topics_relativity_spacetime.html
"Another corollary of Einstein’s former mathematics professor, Hermann Minkowski, was perhaps the first to note this effect (and perhaps understood it even better than Einstein himself), and it was he who coined the phrase “space-time” to describe the interchangeability of the four dimensions. In 1908, Minkowski offered a useful analogy to help explain how four-dimensional space-time can appear differently to two observers in our normal three-dimensional space. He described two observers viewing a three-dimensional object from different angles, and noting that, for example, the length and width can appear different from the different viewpoints, due to what we call perspective, even though the object is clearly one and the same in three dimensions.
The idea perhaps becomes even clearer when we consider that our picture of the Moon is actually what the Moon was like 1¼ seconds ago (the time light takes to reach the Earth from the Moon), our picture of the Sun is actually how it looked 8½ minutes ago, and by the time we see an image of Alpha Centauri, our nearest star system, it is already 4.3 years out of date. We can therefore never know what the universe is like at this very instant, and the universe is clearly not a thing that extends just in space, but in space-time.
Due to the relativistic effects of previous section can be considered an example of this: whereas the stay-at-home twin’s progress through Einstein remarked, “For us physicists, the distinction between past, present and future is only an illusion, however persistent”, and these concepts really do not figure at all in Einstein’s justifiably famous formula, E = mc2, which we will look at in the next section."
Write4U
Valued Senior Member
I agree. But it can also be said that time does not have any extent apart from space, no?
DaveC426913
Valued Senior Member
When we move at relativistic speeds, we can trade space for time.
[nm Pad beat me to it]
- Status