Things that make you go "hmmm"?
- Thread starter Caroljeen
- Start date
inertia
Super Member
Sabine Hossenfelder talked briefly about this interesting discovery that came out last summer and the analysis was published in Nature: (Timestamp: ~ 3:31 - 5:47). What's even more curious is that Modified Newtonian Dynamics predicted these larger galaxies before their discovery, thereby falsifying the lambda cold-dark-matter standard model of cosmology.
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I just read this morning that a researcher was able to make light slow down to 17 mph and stop completely.
news.harvard.edu
Researchers now able to stop, restart light
Two years ago we slowed it down to 38 miles an hour now weve been able to park it then bring it back up to full speed. Lene Hau isnt talking about a used motorbike, but about light &mdash that ethereal, life-sustaining stuff that normally travels 93 million miles from the sun in about eight minutes.
news.harvard.edu
inertia
Super Member
You've seen the simplified illustrations of the model as shown below:
The Lambda-CDM model where lambda is the cosmological constant and CDM is Cold, Dark Matter is supported by observational evidence; so it is a good physical non-relativistic model.
- The universe is expanding
- Spacetime is flat, not curved
- independent measurements confirm its predictions
These observations (measurements) include the CMB temperature, Cosmic neutrino background, predictions about Nucleosynthesis, and the Universe's acceleration
In the MOND model, mass is treated not as an inherent characteristic of matter, but as an inertial response of matter instead. Clearly, more exploration is needed since a portion of its predictions was found to be correct to date.
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NASA
inertia
Super Member
I just read this morning that a researcher was able to make light slow down to 17 mph and stop completely.
Researchers now able to stop, restart light
Two years ago we slowed it down to 38 miles an hour now weve been able to park it then bring it back up to full speed. Lene Hau isnt talking about a used motorbike, but about light &mdash that ethereal, life-sustaining stuff that normally travels 93 million miles from the sun in about eight minutes.
I remember reading about ^this^ not too long ago. Here is what one of the physicists has to say:
It's cool - literally.
( gotta love that laboratory! )
I'm betting that Harvard engineers have used the results to begin a new R&D effort here for quantum computing.
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Worth remembering that the speed of light is constant in a vacuum. It slows down by about a thirds when travelling through glass. That is not to say this is not an incredible achievement, but it is not breaking the laws of science as we know them.
I wonder how practical it will be if it is running at 0.000 000 001 K.
Thank you, this is helpful context!