Notes from a presentation by Christian Ready at Windycon 38 on Saturday, November 12, 2011. I have added web links.
The Life and Death of Stars
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Tag Archives: physics
Another look at the OPERA experiment
Following up on Not so fast, folks…..
Game Over for Faster-Than-Light Neutrinos?: Another experiment looking at the same neutrino beam shows results that cannot be reconciled with FTL neutrinos.
Not so fast, folks
Following up on FTL Neutrinos??? and More on “FTL” Neutrinos:
Special Relativity May Answer Faster-than-Light Neutrino Mystery
Followup: FTL neutrinos explained? Not so fast, folks.
Referencing Times of Flight between a Source and a Detector observed from a GPS satellite, a straightforward calculation in basic special relativity once the issue is identified.
Math behind Mythbusters
How to Model Newtons Cradle. I read this before seeing Newton’s Crane Cradle in which the Mythbusters supersize the system. The model assumes conservation of momentum and that the collision is elastic, i.e. kinetic energy is conserved. Assume also that one steel ball cannot pass through another and the solution is determined by simple algebra.
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Written in the stars
The 2011 Nobel Prize in Physics
“Some say the world will end in fire, some say in ice…” *
What will be the final destiny of the Universe? Probably it will end in ice, if we are to believe this year’s Nobel Laureates in Physics. They have studied several dozen exploding stars, called supernovae, and discovered that the Universe is expanding at an ever-accelerating rate. The discovery came as a complete surprise even to the Laureates themselves.
Also see Universe Today and the New York TImes
For background I have some links at Really long range thinking and Long range forecast: Very, very cold and very, very dark,
More on “FTL” Neutrinos
Following up on last night’s post….
Let’s Go Slow on CERN Faster-Than-Light Claims
The skeptics are not simply saying “That’s impossible because it violates relativity.” They are pointing out that it directly contradicts the well established observations of Supernova 1987A. Hence Neutrinos on Speed concludes with a limerick.
Also see xkcd. I should try this: We could use some extra money. Any takers?
FTL Neutrinos???
This Extraordinary Claim Requires Extraordinary Evidence!
Faster-than-light travel discovered? Slow down, folks
I am waiting to see what Sean at Cosmic Variance has to say.
The Smallest Mini-Galaxy in the Universe!
The End of Time …
The Big Crunch: Physicists Make Time End
Physicists Recreate ‘End Of Time’ in Lab
(The technical details) Hyperbolic metamaterial interfaces: Hawking radiation from Rindler horizons and the “end of time”
It should be noted that this is a simulation of one possible way our universe might evolve, one that current observations suggest is incorrect. However, it is a solution of Einstein’s equations of General Relativity, and as such well worth studying.
When I was much younger something like this might have been called an “analog computer.” I have not seen that term much lately.
Dark Matter Explained in One Minute
With no math. From Cocktail Party Physics
See also my post Dark Matter: Still needed.
From Hilbert Space to Dilbert Space, and beyond 