A while back, I explained how polarized sunglasses work, the short version of which is that light reflected off the ground in front of you tends to be polarized, and by blocking that light, they reduce the effects of glare. This is why fishermen wear polarized sunglasses (they make it easier to see through the… Continue reading How Good Are Polarized Sunglasses?
Category: Science
Throwing Something Into Orbit
There’s a lot of stuff in the news lately about asteroids, what with the Dawn mission orbiting Vesta, and the talk of a manned asteroid mission as a possible future step for NASA. Prompted by this, I’m going to dip into the territory usually occupied by Matt and Rhett, and ask a somewhat silly question:… Continue reading Throwing Something Into Orbit
Launch Pad
For the past few years, astronomer and SF author Mike Brotherton has been running the Launch Pad Workshop, a program bringing interested SF authors to Wyoming (where he’s on the faculty) to learn about modern astronomy. The idea is to teach writers the real facts about the weird and wonderful things going on in astronomy… Continue reading Launch Pad
Quantitative Analysis of Bullshit in Physics Abstracts
Via Bee, we have the BlaBlaMeter, a website that purports to “unmask without mercy how much bullshit hides in any text.” Like Bee, I couldn’t resist throwing it some scientific text, but rather than pulling stuff off the arxiv, I went with the abstracts of the papers I published as a grad student, which I… Continue reading Quantitative Analysis of Bullshit in Physics Abstracts
Spaced Out
The final Space Shuttle landed the other day, leading to much lamentation over the end of the program, all over the Internet. It was absolutely choking my Twitter feeds for a while, which is mostly what I was thinking about when I re-tweeted this snide comment from Robert Lamb (though, to be fair, most of… Continue reading Spaced Out
Beat the Heat with SCIENCE!
It’s really frickin’ hot in much of the US. Fortunately, we have central air at home, A/C in the car, and convenient local businesses with air conditioning and free wi-fi. The inadequate HVAC systems in the Science and Engineering building on campus aren’t anywhere near being able to cope with this, so I’m working from… Continue reading Beat the Heat with SCIENCE!
Grade Inflation? Blame the Baby Boomers
A lot of pixels have been spent discussing this study of grade inflation, brought to most people’s attention via this New York Times blog. The key graph is this one, showing the fraction of grades given in each letter category over the last fifty years: Lots of effort is being put into trying to explain… Continue reading Grade Inflation? Blame the Baby Boomers
Quantitative Comparisons Between Disciplines
As many a thoughtless person has observed when learning what I do for a living, physics is really hard. But you may have wondered just how much harder is physics than other subjects? Well, now, we have a quantitative answer: This is a shelf of books at the Burlington, MA Barnes and Noble, clearly showing… Continue reading Quantitative Comparisons Between Disciplines
Roller Slide Physics Simulated
I really ought to be doing other things, but this roller slide business kept nagging at me, and I eventually realized I could mock up a crude simulation of the results. This led to the production of this graph: This looks pretty similar to the Tracker Video data from the previous post, which I’ll reproduce… Continue reading Roller Slide Physics Simulated
Roller Slide Physics Explained
On Monday, I posted a short video and asked about the underlying physics. Here’s the clip again, showing SteelyKid and then me going down a slide made up of a whole bunch of rollers at a local playground: The notable thing about this is that SteelyKid takes a much, much longer time to get down… Continue reading Roller Slide Physics Explained