Built on Facts

Archives for November, 2012

How to keep a laser beam small.

My post about seeing a laser from the moon mentioned  the fact that the beam from a laser spreads as it propagates. We’re used to seeing this from a flashlight – the beam from a flashlight across a room is much smaller than the beam from a flashlight across an open field. Lasers spread too,…

If you’re one of the probably four people who haven’t heard about Nate Silver, you’ve missed out. He’s a statistics guy who runs the always interesting 538 Blog at the New York Times. He made his name in baseball statistics, Moneyball style, and moved into politics where he made state-by-state statistical forecasts of the last…