Does milk spoil while traveling at the speed of light?

3 points by clubhi ↗ HN

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Milk can't travel at the speed of light. Nor can anything else with mass.
Quit being so negative!
Sure it can. It just requires an infinite amount of energy.
It requires infinite time in addition to infinite energy. It's also not a "just", since it needs an engine which can always overpower the breaking effect of the occasional particles of intergalactic space. Even in pure vacuum, there's still an interaction with the 3K background background radiation. (For cosmic particles this is the Greisen–Zatsepin–Kuzmin limit.) Beyond that, there may be vacuum Cherenkov radiation to overcome.

Infinite energy doesn't help if your engine produces waste heat, unless you can also cool infinitely fast.

From its own reference frame, yes. As long as it's in an inertial reference frame, it will spoil at the same rate.
That only holds up to the boundary of the speed of light. If you're actually moving the speed of light time doesn't pass at all, no? Or at least that is my impression -- that to a photon of light it is both simultaneously the big bang and we are all already dead.
Because this is a relativity question, we must consider two perspectives:

Perspective 1: that of an observer watching the milk speed by. Answer -- no, because the milk is (hypothetically) traveling as C, like a photon it doesn't experience time, so it cannot spoil, and the independent observer so reports.

Perspective 2: that of the milk, hypothetically traveling at C. Because the milk is traveling at C, the speed of time, there is no time dimension in any meaningful sense. Lacking a time dimension, the milk isn't in a conventional four-dimensional spacetime frame, therefore it cannot spoil, indeed nothing at all can be said to "happen" in the conventional spacetime sense.

There's a reason why the speed of light is special, and why relativistic frame comparisons break down at that speed -- primarily, there aren't four dimensions essential to forming a basis for relativistic perspectives. So, if we somehow get around the mass-moving-at-C limitation, time still poses an insurmountable problem.

Further reading: http://arachnoid.com/relativity