Built on Facts

Archives for January, 2013

The human eye is sensitive to a portion of the electromagnetic spectrum that we call visible light, which extends from around 400 to 700 nanometer wavelength, peaking in the general vicinity of greenish light at 560 nanometers: Here’s the intensity (formally: power per area per unit solid angle per unit wavelength – whew!) of the…

Gun Control Debate with Mark, Pt. 2

Gun violence is bad. Gun laws have very little to do with it.

The Physics of the Ponytail

The first major computer-animated film was Toy Story. It had a few human characters, most prominently Andy (who spends most of the film wearing a hat) and Sid (who sports a buzz cut). The focus of the film is on the plastic toys. One of the major reasons for this is the fact that toys…

Ok, so this isn’t really physics as such, but it’s pretty fascinating. There’s a very large online community called Reddit in which users submit links which interest them. These links come with two little arrows beside them, and the users can vote the link up or down. Here’s a screenshot of how the website looks…

In which I argue against gun control.

Less Than Absolute Zero

I’m sitting in a hotel in Utah at the PQE 2013 conference.  As I write this, the temperature is a rather brisk 19F. (For everyone else in the world, -7.2C) That’s not cold at all to some of you, but some of you didn’t grow up in south Louisiana. Either way, on the Kelvin scale…

Why calories can be complicated.