The 9 kinds of physics seminar
By MATTHEW RAVE
As a public service, I hereby present my findings on physics seminars in convenient graph form. In each case, you will see the Understanding of an Audience Member (assumed to be a run-of-the-mill PhD physicist) graphed as a function of Time Elapsed during the seminar. All talks are normalized to be of length 1 hour, although this might not be the case in reality.
The “Typical” starts innocently enough: there are a few slides introducing the topic, and the speaker will talk clearly and generally about a field of physics you’re not really familiar with. Somewhere around the 15 minute mark, though, the wheels will come off the bus. Without you realizing it, the speaker will have crossed an invisible threshold and you will lose the thread entirely. Your understanding by the end of the talk will rarely ever recover past 10%.
The “Ideal” is what physicists strive for in a seminar talk. You have to start off easy, and only gradually ramp up the difficulty level. Never let any PhD in the audience fall below 50%. You do want their understanding to fall below 100%, though, since that makes you look smarter and justifies the work you’ve done. It’s always good to end with a few easy slides, bringing the audience up to 80%, say, since this tricks the audience into thinking they’ve learned something.
The “Unprepared Theorist” is a talk to avoid if you can. The theorist starts on slide 1 with a mass of jumbled equations, and the audience never climbs over 10% the entire time. There may very well be another theorist who understands the whole talk, but interestingly their understanding never climbs above 10% either because they’re not paying attention to the speaker’s mumbling.
The “Unprepared Experimentalist” is only superficially better. Baseline understanding is often a little higher (because it’s experimental physics) but still rarely exceeds 25%. Also, the standard deviation is much higher, and so (unlike the theorist) the experimentalist will quite often take you into 0% territory. The flip side is that there is often a slide or two that make perfect sense, such as “Here’s a picture of our laboratory facilities in Tennessee.”
You have to root for undergraduates who are willing to give a seminar in front of the faculty and grad student sharks. That’s why the “Well-meaning Undergrad” isn’t a bad talk to attend. Because the material is so easy, a PhD physicist in the audience will stay near 100% for most of the talk. However, there is most always a 10-20 minute stretch in the middle somewhere when the poor undergrad is in over his/her head. For example, their adviser may have told them to “briefly discuss renormalization group theory as it applies to your project” and gosh darn it, they try. This is a typical case of what Gary Larson referred to as “physics floundering”. In any case, if they’re a good student (and they usually are) they will press on and regain the thread before the end.
The “Guest From Another Department” is an unusual talk. Let’s say a mathematician from one building over decides to talk to the physics department about manifold theory. Invariably, an audience member will gradually lose understanding and, before reaching 0%, will start to daydream or doodle. Technically, the understanding variable U has entered the complex plane. Most of the time, the imaginary part of U goes back to zero right before the end and the guest speaker ends on a high note.
The “Nobel Prize Winner” is a talk to attend only for name-dropping purposes. For example, you might want to be able to say (as I do) that “I saw Hans Bethe give a talk a year before he died.” The talk itself is mostly forgettable; it starts off well but approaches 0% almost linearly. By the end you’ll wonder why you didn’t just go to the Aquarium instead.
The “Poetry” physics seminar is a rare beast. Only Feynman is known to have given such talks regularly. The talks starts off confusingly, and you may only understand 10% of what is being said, but gradually the light will come on in your head and you’ll “get it” more and more. By the end, you’ll understand everything, and you’ll get the sense that the speaker has solved a difficult Sudoku problem before your eyes. Good poetry often works this way; hence the name.
The less said about “The Politician”, the better. The hallmark of such a talk is that the relationship between understanding and time isn’t even a function. After the talk, no one will even agree about what the talk was about, or how good the talk was. Administrators specialize in this.
Some motivation to get you out on the sand tomorrow! Check out the volleyball on at 53 seconds!
Ashanti feat Ja Rule ” Down 4 u!”
RAIN VOLLEYBALL ANYONE? So I’m told that we have a 50/50 chance of precipitation for volleyball tomorrow. So chums, lets put on our boots, head over to the courts, and make it rain!
This is definitely the SONG FOR THE WEEK!
SEAL- Kiss From a Rose
That FIRE SONG
What happened? Last WEEEK
So as memory serves me, this is what happened last round!
Vitamin C lost to Team Crisis, after a stunning rally led by “Superman” Tristan literally rising above his peers to lead crisis to victory.
Team Beibs lost of Vitamin C, after 20 serves that managed to land outside the courts, Vitamin C shabbily beat “the beibsters” in a clash between two pop icons that had the pizazz of an old episode of “Dancing with the Stars”
Team Extra beat Team French, a duel between two teams desperately vying for relevance in the public sphere. Again, the French disproved their relevance.
Team Crisis beat to Inflation Spikers, a good match. I’m sure there is an economic joke here somewhere.
Team extra lost to Inflation Spikers,
Inflation Spikers lost to Team French: Surprise! The French beat someone! Oh, it was just inflation.
Team Beibs lost to Team Crisis: That’s too bad Justin! As an aside, when I googled volleyball and Beiber, I got a picture of you on your volleyball team when you were 10 years old. In the interest of privacy, I did not post it on the team TUMBLR, but just so you know, it’s out there, and everyone knows.