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Most chemical reactions slow down when cooled. Cryo-preservation preserves cells as it slows or stops decay by slowing or stopping change. Another way of accomplishing the same thing (reducing or stopping change), were it possible, would be to dilate local time.So the question is.If you cooled the time keeping element (the part that oscillates at a given rate) of an atomic clock to just above absolute zero would local time as measured by the clock dilate and if so by how much?
The atomic clocks have essentially a tunable oscillator used to emit microwaves, that is being calibrated with the hyperfine transition of the target atoms... cesium, or rubidium. I think the hydrogen clock is similar, but slightly different.So it isn't important how the oscillator is affected by the gravitational forces, or velocity, or whatnot, but rather how the hyperfine energy transition state is affected by gravity, velocity, and etc.Quartz clocks, of course, are dependent on the primary oscillator.
There seem to be basicly two types of clock those with an oscillator controlled by gravitational forces and those with oscillators controlled by inter atomic forces, are there any other possibilities.
Quote from: syhprum on 29/02/2012 13:58:33There seem to be basicly two types of clock those with an oscillator controlled by gravitational forces and those with oscillators controlled by inter atomic forces, are there any other possibilities.My watch works on a torsion basis ie a driven rotational spring oscillation - I think.http://www.rolex.com/en#/world-of-rolex/about-rolex/parachrom-hairspring
Well if hawking was right it wouldn't just contain the blackhole - it would have hawking radiation, creating a background temperature of the universe."The arrow of time still exists due to the mass..." - without hawking radiation (and cosmological constant expansion) you would struggle to show anything that wasn't happening as much in one direction as the other.Time 25 Glyr from the blackhole is fast-ticking compared to that 1 lyr from the blackhole [/color]- you have to specify two points/frames to talking about dilated time. time isn't just dilated - it is dilated compared to somewhere else, it is relative velocities, differences in grav potential.but time for what? I am not convinced on the utility of talking about time in a universe with no matter outside a blackhole
If one builds one quartz clock in the same manner as an atomic clock i.e accertain its resonant frequency by external means I see no reason why it should cease to work at near zero °K.