Einstein found that if one object was at rest and other object was moving at a uniform velocity, their proper time in relation to each other would be different — universeness
Please define time — val p miranda
https://en.wikipedia.org/wiki/TimeTime is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.
the indefinite continued progress of existence and events in the past, present, and future regarded as a whole.
My view is that space has no need to expand since its existence is unlimited. I think that there are serious errors in special and general relativity. That paradigm is holy.
I think in general relativity that the theory of gravity is wrong. I think that space time is wrong In special relativity. I think much is wrong. But do not ask me to defend those views now — val p miranda
Indeed. In relation to each other. — Haglund
But proper time is the time you measure in a rest frame. If course when that frame moves, it's a moving restframe. Coordinate free time is the clock that ticks in a rest frame for an observer in rest. Proper time and coordinate time are different things. Proper time has it's own symbol, ττ. Coordinate time is t. A proper time interval is Lorenz invariant — Haglund
My view is that space has no need to expand since its existence is unlimited. — val p miranda
I accept all of this but my first sentence holds. Proper time and Proper length are labels used in special RELATIVITY! So to say the motions involved are NOT relative is wrong.
1h — universeness
. I think the fact that space is expanding shows that it is not infinite — universeness
Baden
Could you delete my account? Thanks. — kierkegoord
↪chiknsld Please define time — val p miranda
Time is movement. — chiknsld
Proper time though is no relative notion. Neither is proper length — Haglund
All motion is relative. That's what relativity is about. Only relative velocity exists. That's the velocity that's used in the Lorentz transformation. — Haglund
All motion is relative. That's what relativity is about. Only relative velocity exists. That's the velocity that's used in the Lorentz transformation — Haglund
. I think the fact that space is expanding shows that it is not infinite
— universeness
That not true. Space can be infinite and expanding. That's actually the prevailing view. Which with I disagree. — Haglund
So the notion of proper time and proper length are used is special RELATIVITY and are 'relative notions — universeness
AFAIK universe expansion implies "creating new space". Quite far from this response.
d) This kind of universe expansion is equivalent to measurement contraction.
I have the same viewpoint as c. I think you can expand into something which is infinite but that which IS infinite cannot expand. — universeness
So the notion of proper time and proper length are used is special RELATIVITY and are 'relative notions.' — universeness
Proper time is just an infinite small interval of time which is independent on the frame used. It's different from coordinate time, which is frame dependent, and which is used in Lorenz transformations. and does not exist for a photon, which follows lightlike paths. — Haglund
The prevailing view is that the universe is infinite. This is based on observed flatness. But just as for a flat Earth, if you look beyond the horizon, the Earth is pretty much sphere! So basically, flat spacers are the same as flat Earthers.. — Haglund
Why shouldn't something infinite be able to expand? — Haglund
How can the proper lifetime of a muon be relative if it's the same for all? It's just defined as the time as measured in the restframe of the muon. Of course, if you look at the muon as it travels fast, the proper time seems to slow down, but its the same still — Haglund
Another view is that it may be infinite but not boundless. — universeness
In science, infinite means boundless. That which is boundless cannot expand or else boundless does not mean boundless. — universeness
In 'reality,' muons don't have a restframe. So your 'proper lifetime,' label is notional. — universeness
Infinite with bounds? I don't understand — Haglund
Which doesn't mean infinite space cant expand. — Haglund
Eternal inflation posits an infinite space eternally inflating. — Haglund
Muons have a restframe like electrons have. — Haglund
Infinite but not boundless simply means that the Universe may have parts that we will never be able to even 'detect,' so in that sense it has very real boundaries for lifeforms such as us. — universeness
Yes it does if the infinite can expand then it was not infinite. — universeness
I understand eternal inflation to be referring to the limits/edges of the Universe. — universeness
Can we actually bring a photon, an electron, a muon to rest? Has this ever been actually achieved? — universeness
infinite observable universes — Haglund
It's like the cookie dough example. The TOTALITY of the dough cannot expand if it is infinite but individual regions within the dough may be able to 'distort.'It can. In infinite many regions, the regions can expand. Infinity can become twice it's size and stay the same — Haglund
Get involved in philosophical discussions about knowledge, truth, language, consciousness, science, politics, religion, logic and mathematics, art, history, and lots more. No ads, no clutter, and very little agreement — just fascinating conversations.