Built on Facts

Archives for September, 2012

Magneto and Momentum

There’s this grim and affecting scene in both X-Men and X-Men: First Class – a young Erik Lehnsherr watches his family hauled away by Nazis through the gates of a concentration camp. He’s being dragged away by the Nazi guards, and he uses his magnetic powers for the first time to grab the gates with…

How Single-Colored Is A Laser?

In most books or articles that talk about lasers, you’ll see a definition of laser light in terms of “coherence”. But coherence is sort of a term of art, and the books will go on to explain coherence in terms of the waves being in sync with each other, or the emitted light being very…

Some Cute Math

Back before my now-ended blogging hiatus, the server machinery that keeps ScienceBlogs running was not so snazzy as it is now. Now it’s running a WordPress implementation that includes LaTeX support. LaTeX is a free environment for (among other things) typesetting mathematics. Let’s give it a test run: I actually came across the above expression…

Armstrong in Orbit

If you’ve been reading ScienceBlogs for a while, you might remember this little physics blog I used to write. It and I sort of vanished off the internet for a long while. More than a year, I’m sad to say. Long story short, being a grad student takes up a huge amount of time. While…