Physics
drorzel | March 20, 2012A couple of cool items in the promotion of How to Teach Relativity to Your Dog:
-- A little while back, I spoke to Alan Boyle, who writes the Cosmic Log blog for MSNBC, who posted a very nice story about the book last night. Mainstream media, baby!
It also uses this very cool picture of Emmy and me in my lab:
(Many thanks to Matt Milless for taking that and a bunch of others.)
-- This weekend (either Saturday or Sunday, depending on where you are), I'll be on the Science Fantastic radio show, talking about relativity with Michio Kaku. There's a lsit of stations that carry it linked from that…
esiegel | March 19, 2012"To use Newton's words, our efforts up till this moment have but turned over a pebble or shell here and there on the beach, with only a forlorn hope that under one of them was the gem we were seeking. Now we have the sieve, the minds, the hands, the time, and, particularly, the dedication to find those gems--no matter in which favorite hiding place the children of distant worlds have placed them."
-Frank Drake and Dava Sobel
Looking up at the canopy of stars in the night sky, and realizing that each point of light is a star system not so unlike our own, one can't help but wonder about those…
drorzel | March 19, 2012I'm trying not to obsessively check and re-check the Dog Physics Sales Rank Tracker, with limited success. One thing that jumped out at me from the recent data, though, is the big gap between the book and Kindle rankings over the weekend. The book sales rank dropped (indicating increased sales, probably a result of the podcast interview), while the Kindle rank went up dramatically. This suggests that people who listen to that particular podcast are less likely to buy new books on the Kindle than new books on paper.
This got me wondering, though, whether this was an anomaly, or a general truth…
drorzel | March 17, 2012I've done a bunch of publicity stuff for How to Teach Relativity to Your Dog, some of which frustratingly continue to not appear yet, but one thing from this week has gone live: a podcast interview on the Matt Lewis Show, where I talk about why and how I explain physics to the dog, and a little bit about why relativity is cool.
I continue to struggle a bit with the fact that relativity is a very visual subject-- most of the best explanations involve pictures, which aren't much help in an audio-only medium. I had trouble with this at Boskone, too-- when I was doing a reading, it was hard to…
esiegel | March 16, 2012"The saying 'It's not over 'til the fat lady sings' is erroneous, because women who are fat are never listened to." -Margaret Cho
Last year, the OPERA collaboration made worldwide headlines when they announced the results of a remarkable experiment.
Image credit: OPERA / CERN.
From over 730 kilometers away, in another country, neutrinos were created by one of the most powerful particle accelerators in the world. Protons at over 99.999% the speed of light were smashed into matter, creating a highly collimated beam of neutrinos, which was launched through the Earth at, presumably, speeds…
drorzel | March 16, 2012A little more tab clearance, here, this time a few recent stories dealing with those elusive little buggers, neutrinos. In roughly chronological order:< /p>
The Daya Bay experiment in China has measured a key parameter for neutrino oscillation (arxiv paper), the phenomenon where neutrinos of one of the three observed types slowly evolve into one of the others. Mathematically, this is described as each of the three types we observe being an admixture of three more fundamental types. This mixing is described in terms of the sine of some "mixing angle," because physicists love geometry,…
drorzel | March 14, 2012One of the things that made me very leery of the whole Brian Cox electron business was the way that he seemed to be justifying dramatic claims through dramatic handwaving: "Moving an electron here changes the state of a very distant electron instantaneously because LOOK! THE WINGED VICTORY OF SAMOTHRACE EINSTEIN-PODOLSKY-ROSEN PAPER!" On closer inspection, it's not quite that bad, though it takes very close inspection to work out just what they are claiming.
That said, though, it's fairly common to hear claims of the form "when two particles are entangled, anything you do to one of them…
esiegel | March 13, 2012"It is the supreme art of the teacher to awaken joy in creative expression and knowledge." -Albert Einstein
Last month, an interesting conversation happened on the topic of the most difficult course that a student takes in their studies.
Image credit: Steve Perrin / University of Michigan MSIS.
The question, of course, was asking about most difficult in terms of the course content that the student must learn. In any field, there are plenty of options to choose from, and while an individual student's mileage may vary, teachers and professors tend to learn very quickly just which courses (and…
drorzel | March 13, 2012I finally got a copy of Cox and Forshaw's The Quantum Universe, and a little time to read it, in hopes that it would shed some light on the great electron state controversy. I haven't finished the book, but I got through the relevant chapter and, well, it doesn't, really. That is, the discussion in the book doesn't go into all that much more detail than the discussion on-line, and still requires a fair bit of work to extract a coherent scientific claim.
The argument basically boils down to the idea that the proper mathematical description of a universe containing more than one fermion is a…
drorzel | March 12, 2012The Links Dump item about software patents this morning includes a lament that there are so many silly little software patents, organized so badly, that finding one you might be infringing would take forever. This may or may not be a convincing argument against them, but for a physics geek like me, my first reaction was "You just need a quantum computer running Grover's algorithm for searching an unsorted database." And I suppose there's a background element for a satirical SF novel in that-- quantum computers ultimately being developed not by banks or the NSA, but by lawyers looking to speed…
esiegel | March 9, 2012"Is no one inspired by our present picture of the Universe? This value of science remains unsung by singers, you are reduced to hearing not a song or poem, but an evening lecture about it. This is not yet a scientific age." -Richard Feynman
Back in 2008, Time Magazine interviewed Neil de Grasse Tyson, and asked him, " What is the most astounding fact you can share with us about the Universe?" His answer was indeed a very good, true, and astounding fact about the Universe: that all the complex atoms that make up everything we know owe their origins to ancient, exploded stars, dating back…
drorzel | March 8, 2012Yesterday was a really grueling day, and I'm home with The Pip today, so no substantive blogging. But here's a song about the universe, written and performed by one of my colleagues:
If this becomes the next LHC Rap, remember you heard it here first.
By a weird coincidence, we've been watching our Animaniacs DVD's with SteelyKid, and just a couple of days ago got to this one:
So that's not one, but two songs about the universe. Which ought to be enough to keep you entertained for the day.
drorzel | March 7, 2012So, the news of the moment in high-energy physics is the latest results being reported from a conference in Europe. The major experimental collaborations are presenting their newest analyses, sifting through terabyte-size haystacks of data looking for the metaphorical needle that is the Higgs boson.
And what are those results? It sort of depends on who you ask. Tommaso Dorigo points at the final data from the Tevatron and claims victory; Matt Strassler thinks the lack of evidence at the LHC is almost as important, though there is progress there in excluding some new regions. The net result is…
drorzel | March 6, 2012The new book is out, which means it's time for lots of promotional efforts and links to radio shows and news articles and that sort of thing. Such as this one: I'll be talking about relativity and dog physics tomorrow night, Wednesday the 7th, on the Big Science radio program(me) at 9pm London time (in the frame of reference in which London is at rest, anyway). This'll be the first radio show for the new book, though I've done a few phone interviews for print publications (links as they become available...).
If you're in London, and have nothing better to do, tune in. (We are, after all, more…
drorzel | March 6, 2012My course on the history and science of timekeeping has reached the home stretch, with students giving presentations in class for the remainder of the term. My portion of the course was wrapped up with two lectures on "quantum timkeeping," as it were: a lecture on the development of quantum mechanics:
History of Quantum Mechanics
View more PowerPoint from Chad Orzel
And one on the development of atomic clocks:
A History of Atomic Clocks
View more PowerPoint from Chad Orzel
These are pretty fast-moving, but by this point in the course, students were already working on their final…
drorzel | March 5, 2012My timekeeping course this term is a "Scholars Research Seminar," which means it's supposed to emphasize research and writing skills. Lots of these will include some sort of poster session at the end of the term, but I decided I preferred the idea of doing in-class oral presentations. Having assigned that, of course, I felt I ought to give them a class with advice on how to give an oral presentation. I went looking for advice on this, and found that I wrote a guide to giving good PowerPoint lectures back in 2006 (God, I'm a blogging dinosaur...), which holds up pretty well. So, I dusted that…
drorzel | February 29, 2012The Subject: header pretty much says it all: How to Teach Relativity to Your Dog is reviewed in Nature Physics. I am inordinately pleased with the existence of this-- not because I expect it to sell a significant number of books, but because a serious technical publication recognized it as worth writing up, despite the silly title.
Of course, Nature being Nature, it's paywalled, so you can only read the full thing via the above link if you have institutional access, or know a nice person who will email you a copy when you ask for it on Twitter. The review itself is about what I would expect…
drorzel | February 29, 2012One of the big stories in genre Internet news was Seanan McGuire's post last week, about reactions to the early release of some copies of her book, and the hateful garbage thrown her way by people outraged that the ebook didn't slip out early as well. And let me state right up front that the people who wrote her those things are lower than the slime that pond scum scrapes off its shoes. That's absolutely unconscionable behavior, and has no place in civilized society.
That said, Andrew Wheeler picked up on something that also struck me as odd, namely the way McGuire was so upset about paper…
esiegel | February 29, 2012"When in doubt, make a fool of yourself. There is a microscopically thin line between being brilliantly creative and acting like the most gigantic idiot on earth. So what the hell, leap." -Cynthia Heimel
Once every four years, the elusive entity that is today -- February 29th -- comes along. The historical origins and urban legends associated with it are incredibly interesting, but the reason there's any such thing as Leap Day at all is because of the physics of planet Earth.
Image credit: Mrs. Snyder at the Seven Hills School.
The Earth, of course, is rotating on its axis while…
esiegel | February 28, 2012"One mustn't look at the abyss, because there is at the bottom an inexpressible charm which attracts us." -Gustave Flaubert
The deepest depths of space, out beyond our atmosphere, our Solar System, and even our galaxy, hold the richness of the great Universe beyond. Stretching for billions of light years in every direction, there are structures large and small, dense and sparse, everywhere we've ever dared to look.
Image credit: R. Jay GaBany, Cosmotography.com.
In addition to the visible, luminous matter we see in the image above, there's both non-luminous normal matter and dark matter.…