Physics
drorzel | March 19, 2013I had lunch with Ethan Zuckerman yesterday, and we were talking about technology and communicating science to a mass audience, and Michio Kaku came up. Specifically, the fact that he's prone to saying stuff that's just flat wrong, if not batshit crazy-- see this angry post from 2010 for an example.
It was amusing, then, to return to my RSS reader and find first Sean Carroll and then Matt Strassler expressing outrage and annoyance over some incredibly dumb things Kaku said about the Higgs Boson. My initial reaction was along the lines of "Yeah, welcome to the club," but I suspect that that's…
esiegel | March 17, 2013"Build a man a fire, and he'll be warm for a day. Set a man on fire, and he'll be warm for the rest of his life." -Terry Pratchett
Whether it comes from without or within, there are few things in this life that captivate our attention better than a brilliant, hot and colorful display. This weekend, have a listen to The Roots with John Legend, as they sing about
The Fire.
Deep off in the depths of space, although you won't find any stars burning a bright green color, you will find stellar remnants, or star corpses, glowing a brilliant green.
Image credit: NASA, ESA, and the Hubble Heritage…
esiegel | March 15, 2013"If you're a reporter, the easiest thing in the world is to get a story. The hardest thing is to verify. The old sins were about getting something wrong, that was a cardinal sin. The new sin is to be boring." -David Halberstam
It was only a few months ago that both collaborations at the Large Hadron Collider in CERN -- CMS and ATLAS -- announced the discovery of a new particle at about 125-126 GeV of energy: something that looked an awful lot like what the Standard Model predicted the Higgs Boson should be.
Image credit: the CMS detector at CERN, 2009.
This was the result of decades of…
esiegel | March 13, 2013"As a boy I believed I could make myself invisible. I'm not sure that I ever could, but I certainly had the ability to pass unnoticed." -Terence Stamp
When we look up at the night sky from a dark location here on Earth, somewhere around 6,000 stars greet you on a clear night.
Image credit: Tamas Ladanyi (TWAN).
This is just a tiny fraction of the hundreds of billions of stars that actually make up our galaxy, which makes sense, considering how large our galaxy is and how vast the distances between the stars is. You'd probably think that the stars we can see are pretty representative of the…
drorzel | March 12, 2013SteelyKid has started to demand Sid the Science Kid videos, which of course we are implacably opposed to around here. One of the recent episodes available online was "Slide to the Side," talking about friction. While this partakes a bit of the Feynman "Energy makes it go" problem, it was generally pretty good, and prompted a question from Kate that (combined with Rhett's latest.
Kate and SteelyKid were talking about how friction keeps things from sliding, then Kate asked me whether it would be possible to keep anything at rest on a truly frictionless surface, due to the rotation of the Earth…
esiegel | March 8, 2013“You wait for a gem in an endless sea of blah.” -Lawrence Grossman
On the one hand, we have General Relativity, our theory of space, time, and gravity.
Image credit: Wikimedia commons user Johnstone; Earth from NASA's Galileo mission.
It describes the Universe on both large and small scales perfectly, from the hot Big Bang to our cold accelerating expansion, from vast superclusters of galaxies down to the interiors of black holes.
Image credit: NASA, ESA, M. Postman (STScI), and the CLASH Team.
But General Relativity doesn't tell us everything. It doesn't tell us, for example, about…
esiegel | March 6, 2013"The atoms come into my brain, dance a dance, and then go out - there are always new atoms, but always doing the same dance, remembering what the dance was yesterday." -Richard Feynman
Here you are, a human being, a grand Universe of atoms that have organized themselves into simple monomers, assembled together into giant macromolecules, which in turn comprise the organelles that make up your cells. And here you are, a collection of around 75 trillion specialized cells, organized in such a way as to make up you.
Image credit: J. Roche at Ohio University.
But at your core, you are still just…
esiegel | March 1, 2013"The mind, once expanded to the dimensions of larger ideas, never returns to its original size." -Oliver Wendell Holmes
When General Relativity supplanted Newton's work as our theory of how gravity works in the Universe, it didn't just change how we view how masses attract, it gave us a new understanding of what the questions where and when actually mean. It gave us the very fabric of spacetime.
Image credit: Christopher Vitale of http://networkologies.wordpress.com/.
What this meant is that no longer could we view objects like matter and radiation as existing in some fixed, grid-like…
drorzel | March 1, 2013This is the physics book that's generating the most buzz just at the moment, by noted string theorist Leonard Susskind and George Hrabovsky, based on a general-audience course Susskind's been running for years. It's doing very well, with an Amazon rank in the 300's, which is kind of remarkable for a book with this many equations. Using calculus, even.
Odd though it might seem given the mathematical content, this is a book that has a lot in common with Cox and Forshaw's Why Does E=Mc2?. By which I mean that it sets out to present a very particular take on theoretical physics to a general…
esiegel | February 27, 2013"Where you used to be, there is a hole in the world, which I find myself constantly walking around in the daytime, and falling in at night." -Edna St. Vincent Millay
I'm sure you've thought about it before: what would happen if you dropped something into a bottomless pit?
Image credit: original source unknown.
No, not one of those fake bottomless pits that you find in various Mystery Spots off the beaten trail.
Image credit: Mel's Hole, courtesy of http://komonews.com/ in Seattle, Washington.
Those may be deep, but they're definitely not bottomless. And I want something truly bottomless…
pharyngula | February 26, 2013I just got back from this evening's Cafe Scientifique — where were you guys? — and I got to see lots of pretty pictures of halos and sundogs and light pillars. One of the nice things about living in Morris is that we actually get a lot of that weird atmospheric phenomena here, because we have lots of the raw material for them here: ice crystals. Vast drifting clouds of hexagonal crystals, flat and columnar, of various proportions, floating in the sky at various orientations to both refract and reflect light into our eyes.
I won't go into all the details, since you weren't there. And since…
drorzel | February 26, 2013Over in Twitter-land, Ben Lillie of the Story Collider asked an interesting question, which sparked some discussion that he's Storified on a Tumblr blog (just in case the date stamp wasn't enough to mark this as 2013...). The original question was:
Partly I’m wondering if there is a reason to have an event series for “other scientists,” but also wondering about the bigger question: is there something about being a scientist that makes it easier to understand other bits of science? I suspect the answer is “a bit,” but really want to know specifically what one could say to scientists they…
esiegel | February 22, 2013"When I say, 'I love you,' it's not because I want you or because I can't have you. It has nothing to do with me. I love what you are, what you do, how you try. I've seen your kindness and your strength. I've seen the best and the worst of you. And I understand with perfect clarity exactly what you are." -Joss Whedon
I bet you love science; practically all of us do, whether we realize it or not. As children, we all live as scientists, born with no knowledge or experience of this world, but with inherent ability to learn and adapt.
Image credit: ©2005-2013 ~cchhrriissttaa, of deviantART.…
drorzel | February 22, 2013We've got calls out to the local grad programs, and I've mentioned this on Twitter a couple of times, but it can't hurt anything to post it here as well: we've got a huge overabundance of first-year engineering students that is forcing us to open extra sections of our intro physics classes to accommodate them. The problem is, we don't have people to teach the new sections. Thus, we are looking for an adjunct to take one section of intro physics or introductory astronomy labs, starting in April and running through mid-June.
If you're within convenient distance of Schenectady, NY, and might be…
esiegel | February 20, 2013"We've learned from experience that the truth will come out. Other experimenters will repeat your experiment and find out whether you were wrong or right. Nature's phenomena will agree or they'll disagree with your theory. And, although you may gain some temporary fame and excitement, you will not gain a good reputation as a scientist if you haven't tried to be very careful in this kind of work." -Richard Feynman
Did you hear the news? A game-changing story about the Universe has just come out! Something is vastly, spectacularly different from the way we thought, and it will revolutionize the…
drorzel | February 19, 2013This past weekend, I was at Boskone, where I appeared on a few science-y panels. One of these was on the possibility of beaming power down from space:
Energy From Space
Beam me down some juice, Scotty? Let's talk about the possibilities -- and practicalities -- of really long-distance power transmission.
Tom Easton (M), Jordin T. Kare, Chad Orzel, Jeff Hecht, Joan Slonczewski
This was a little odd, as Jordin does this for a living-- he's been working on a proposal to NASA for a solar power generating satellite that would use lasers to beam power down to photovoltaic panels on the ground--…
esiegel | February 15, 2013“Don't wake me for the end of the world unless it has very good special effects.” -Roger Zelazny
It's always the ones you least expect that get you the worst, it seems. I went to bed last night excited that Asteroid 2012 DA14, a 200,000 ton asteroid, was going to pass within just 28,000 km (or 17,000 miles) of Earth's surface, which would make it the closest pass of an asteroid that large that we've ever observed.
Image credit: NASA / JPL Near-Earth Object Program Office.
I thought that would be the best way to celebrate today, which would be Galileo's 449th birthday. After all, it was…
drorzel | February 15, 2013Yesterday's post about differences between intro physics and chemistry sparked an interesting discussion in comments that I didn't have time to participate in. Sigh. Anyway, a question that came up in there was why we have physicists teach intro physics courses that are primarily designed to serve other departments.
It's a good question, and in my more cynical moments, I sort of suspect it's because engineering faculty are canny enough to outsource the weeding-out of the students who can't hack it in engineering. But I think there are good reasons, particularly at a liberal arts school like…
drorzel | February 14, 2013Not long ago, I had a meeting with the Dean, who is a chemist. One of the things I talked about was my plan for distributing teaching assignments in the next few years, which ran into an interesting cultural difference. I explained how I was trying to make the distribution of assignments a little more regular and uniform, getting everybody to teach both intro and upper-level courses, and he said (paraphrased), "That's funny. We never have a problem with that in chemistry-- the organic chemists teach Orgo, and the rest of us teach general chemistry, and that's that."
It took me a minute to put…
esiegel | February 13, 2013"It does no harm to the romance of the sunset to know a little bit about it." -Carl Sagan
I would argue the exact opposite, in fact: the beauty of a sunset, in all of its varieties and variations, is only enhanced the more you know about it.
Image credit: Dan Schroeder, via Picasa.
The next time you watch the Sun descend through the sky, towards the horizon, you might marvel at how the Sun remains the same size all the way down. At just slightly over half-a-degree, the Sun appears to drop at a constant rate throughout the afternoon and into early evening.
But there are some small changes…