A question on quantum physic's.

[Tathradj]

A conundrum that I have been discussing in earnest.
Funny one to ask on a forum like this but well,
some of us are rather switched on.

The Voyager Craft.
We have a space ship speeding away from earth with 100 years of plutonium fuel on board.

Does the fuel last 100 years our time and at what time does the fuel expire on Voyager. ?
And, Will Voyager travel further as time slows down when traveling away from earth. ?

To us, it is 100 years.
To Voyager, when will that happen. ?

I know there is a clock on board that was synced when the craft left but no one will answer
my question as to what the clock is now showing in our time.

 

[Ded Driver]

Tath, the answer isnt in Quantum Physics, but General Relativity.
to cut it short
the fuel will last 100yrs relative to the time/space that the device exists in, ie, in the craft, wherever/whenever it might be.
But, as its speed increases (relative to a zero on earth), the time it travels will be less than on earth, so if the fuel lasts 100yrs on-board, then more than 100yrs will have passed on earth. A date/time clock on-board will show less than a synchronised clock on earth.
cosmic radiation & particles will most likely damage the electronics before it expires.

 

[user 7222]

Gravity is very much associated with time. Even the folks on the ISS are experience a time difference albeit incredibly small but it is measurable.

 

[Goldfreak]

I feel your conundrum pain Tathradj. Hope this helps but for me it made it worse as it raises more questions. https://en.m.wikipedia.org/wiki/HafeleKeating_experiment which direction is it travelling ? Does it matter if its not really east or west ? Sorry cant help my head just exploded..

 

[Rockhunter62]

That's an easy one. Who cares. Questions like that are better left for round the camp fire with several drinks.

Cheers

Doug

 

[goldtruck59]

That's an easy one. Who cares. Questions like that are better left for round the camp fire with several drinks.

Cheers

Doug

I agree !! Quantum Phisics or Physics is not on my radar .
I'm trying to decide which pub to go to for the Xmas break up and which gully I am next going to wave that bloody detector of mine.
That's enough to keep my small brain occupied. !!!

GT

 

[BigWave]

In my earlier career days, I worked with the Post Master General's (PMG) Time and Frequency Standards Research Section.
(PMG was later split into Telecom Australia and Australia Post).
That research group had the task of maintaining Australia's time and frequency reference, by phase-locking quartz oscillators (good short term stability) to Rubidium atomic clocks, which were in-turn, phase locked to Cesium atomic clocks (very good long-term stability).
1 second in the metric SI system is 9,192,631,770 cycles of the RF radiation given from the Cesium clock.
On a regular basis, 2 Cesium clocks were flown to Greenwich (UK), but in opposite directions around the globe, synchronised, then flown home (again in opposite directions [recording altitude, duration and velocity paths]). On arrival back in Oz, Einstein's equations used to correct for each clock's time using the nav logs (altitude, duration and velocity), and our time reference updated.
These days, there are Cesium clocks all around the globe, which all continually report their time to each other, with some clever distributed algorithm deciding the weighting of each clock's accuracy and calculating the "true world time" and feeding back corrections to all clocks.
Why the insistence on such accurate time keeping?
One example is Nav Systems such as GPS, which must have accurate timing, with each satellite's time corrected for Relativistic effects in order to achieve current location tolerances.
Just thought you should know

 

[Goldfreak]

So you know all this and still drive a jeep ? layful:

 

[madtuna]

I tend to ponder much more immediate pressing concerns....

Should I put pants on today or not?
Should I scrape the fuzz off the remaining bit of cake Doug and Carol made me and risk it myself, or feed it to the Bungarra sitting in my doorway instead?
That one nipple hair two inches longer than the rest, pull it out or trim it to the same length?
Wheatbix, toast or both this morning?
Why did Mr and Misses Labuschagne name their kid Marnus? Who names their kid Marnus? I bet kids at school called him Anus Labuschagne or maybe Anus Champagne.

As for fuel and time? My diesel is free and I don't own a watch :Y:

 

[Outback]

Well.......given that Voyager is only travelling at approximately 0.06% of light speed, time dilation will not be happening so the time difference would be negligible. Maybe a picosecond difference!
It's plutonium has a half life of around 88 years so the power output will be on the decline and will go silent between 90 and 110 years. Its power reserves will be at 78% in 100 years (our time and its time) and wont be able to transmit anymore - its just a "I'm alive" signal at the moment!
So no time dilation, same time for earth and Voyager and relativity holds true!

Cheers :beer:
Jack

 

[Outback]

Whoops '' a PS..
Voyager doesn't use its plutonium power bank (about 500watts) to provide thrust! It is just cruising along under it's own momentum provided by gravitational sling shots in it's past missions.
It has nothing to slow it down or speed it up (unless it gets another gravitational assist or crashes into something). So it will just keep on puttering on into interstellar space.

 

[Jaros]

In my earlier career days, I worked with the Post Master General's (PMG) Time and Frequency Standards Research Section.
(PMG was later split into Telecom Australia and Australia Post).
That research group had the task of maintaining Australia's time and frequency reference, by phase-locking quartz oscillators (good short term stability) to Rubidium atomic clocks, which were in-turn, phase locked to Cesium atomic clocks (very good long-term stability).
1 second in the metric SI system is 9,192,631,770 cycles of the RF radiation given from the Cesium clock.
On a regular basis, 2 Cesium clocks were flown to Greenwich (UK), but in opposite directions around the globe, synchronised, then flown home (again in opposite directions [recording altitude, duration and velocity paths]). On arrival back in Oz, Einstein's equations used to correct for each clock's time using the nav logs (altitude, duration and velocity), and our time reference updated.
These days, there are Cesium clocks all around the globe, which all continually report their time to each other, with some clever distributed algorithm deciding the weighting of each clock's accuracy and calculating the "true world time" and feeding back corrections to all clocks.
Why the insistence on such accurate time keeping?
One example is Nav Systems such as GPS, which must have accurate timing, with each satellite's time corrected for Relativistic effects in order to achieve current location tolerances.
Just thought you should know

Were you up at the complex north of Sth. Morang.

 

[Tathradj]

That was my answer but it did not fare very well. :lol:

Tath, the answer isnt in Quantum Physics, but General Relativity.
to cut it short
the fuel will last 100yrs relative to the time/space that the device exists in, ie, in the craft, wherever/whenever it might be.
But, as its speed increases (relative to a zero on earth), the time it travels will be less than on earth, so if the fuel lasts 100yrs on-board, then more than 100yrs will have passed on earth. A date/time clock on-board will show less than a synchronised clock on earth.
cosmic radiation & particles will most likely damage the electronics before it expires.

 

[Tathradj]

Classic. :awful:

So you know all this and still drive a jeep ? layful:

 

[Ded Driver]

they should have named Voyager 'Jeep' instead .... it aint eva comin home .. just ask the Robinson's, they didn't come home :lol: :lol: :lol:

 

[Ded Driver]

Outback, the time difference is negligible, but still exists.
Tahradj, as is done for the ISS & GPS satellites, the time difference on-board can be calculated, but I turn my maths brain off on weekends layful:

 

[Outback]

Outback, the time difference is negligible, but still exists.
layful:

Yes we both agree it's so tiny to be negligible , I did say in my first post maybe a picosecond

For those who don't know how small a time frame is a picosecond :
There are many measures of time that are less than a second. Here are some : ... Microsecond(One millionth of a second) Nanosecond(One billionth of a second) Picosecond(One trillionth of a second)

Have Fun
Jack .

 

[BigWave]

Were you up at the complex north of Sth. Morang.

No Jaros - Collins Street in Melbourne.
Then out to Clayton when the research labs unified out there.
We had the best equipped electronics research labs in the Southern hemisphere :Y:

 

[BigWave]

they should have named Voyager 'Jeep' instead .... it aint eva comin home .. just ask the Robinson's, they didn't come home :lol: :lol: :lol:

Sorry to disappoint DD, but in a few years its done WA twice, the tip of Cape York twice, Forsayth (FNQ) and around Australia.
Off to Leigh creek shortly.
Never missed a beat (lost a few windscreens though ). My local mechanic has two WK2s, and swears by them.
I'm guessing it's the quantum dilating flux capacitor?

 

[BigWave]

Hey Jack, even at at 0.06% of the speed of light, then Voyager's clock would appear to be running slower by a factor of 0.99999982.
This means that after 1 year, we would "see" it's clock retarded by 5.68s (but that's just my math - excluding gravitational effects).
I may have been mistaken