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Random picture thread

This is a 580 foot long, 4 foot around bore drilled by my cousin.

20241228_162555.jpg
 
The proverbial light at the end of the tunnel.

What’s it gor?
I've seen him fill in the light at the end of a tunnel in a federally owned and abandoned drain line. They solidly seal one end with concrete blocks. The one I saw was around 300 feet. They put in three 6 inch pipes. One 200 foot long, one 100 and the last 50. They pump in the concrete till the longest pipe is full.
Then the next pipe is pumped till it's full. These lines are no longer needed and are filled so as not to collapse. 300 yards of concrete.

So in those cases, there is no light at the end of the tunnel. LOL.

These can be additional after thoughts to alleviate water drainage issues not caught by engineers originally. BIG MONEY!!!
 
Quantum field theory suggests that electromagnetic fields naturally fluctuate, and these fluctuations can be harnessed as a source of perfect randomness. Many potential applications of randomness rely on controllable probability distributions. We show that vacuum-level bias fields injected into multistable optical systems enable a controllable source of quantum randomness, and we demonstrated this concept in an optical parametric oscillator (OPO). By injecting bias pulses with less than one photon on average, we controlled the probabilities of the two possible OPO output states. The potential of our approach for sensing sub–photon-level fields was demonstrated by reconstructing the temporal shape of fields below the single-photon level. Our results provide a platform to study quantum dynamics in nonlinear driven-dissipative systems and point toward applications in probabilistic computing and weak field sensing.

https://www.science.org/doi/10.1126/science.adh4920
 
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