Some folks I used to work with at NIST have looked at cheap green laser pointers, and found a potential danger. Some of the dimmer-looking green lasers are not so dim in the infrared, and in one case emitted 10X the rated power in invisible light. This could be a potential eye hazard. You can… Continue reading Do Not Look In Laser Pointer With Remaining Eye
Author: Chad Orzel
Links for 2010-08-13
Think Globally, Compromise Locally – Green Blog – NYTimes.com “Bill McKibben, whose 1989 book, “The End of Nature,” helped coalesce and spread worry about climate change, views the national environmental groups’ strategy of winning support for energy and climate legislation by compromising with industry as a complete failure. “The result: total defeat, no moral victories,”… Continue reading Links for 2010-08-13
Thursday Toddler Blogging 081210
Now that she’s officially two years old, SteelyKid gets to sit in the big chairs: She also insisted on the forced-perspective thing to make her look even bigger compared to Appa. And the string cheese. She’s all about the string cheese.
Why I Don’t Have a Smart Phone
My parents are in the Caribbean at the moment, and threatened to send me cell-phone pictures of white beaches and blue water. They were thwarted in this by the fact that I still have a cheap LG flip phone with no camera. Our calls from home are exclusively made using a landline phone. You can… Continue reading Why I Don’t Have a Smart Phone
Crazy and Dishonest Physics Update
The problem with writing about fake physics is that once you start, it’s hard to stop. And there’s always something new and disreputable to find, such as this hideous bit of scammery. As I said in How to Teach Physics to Your Dog, if quantum physics really allowed you to amass vast wealth just by… Continue reading Crazy and Dishonest Physics Update
What Do You Need to Make Cold Atoms? Part 2: Lasers and Optics
Following on yesterday’s discussion of the vacuum hardware needed for cooling atoms, let’s talk about the other main component of the apparatus: the optical system. The primary technique used for making cold atoms is laser cooling, and I’m sure it will come as no surprise that this requires lasers, and where there are lasers, there… Continue reading What Do You Need to Make Cold Atoms? Part 2: Lasers and Optics
Links for 2010-08-12
If Physical Books Are Dead in Five Years, How Do the Poor Find Books? Whither (or Wither?) the Library? : Mike the Mad Biologist “The great promise of our libraries is that, if you can physically get there (and for some services, even that isn’t required), you have access to the materials, rich or poor.… Continue reading Links for 2010-08-12
What Do You Need to Make Cold Atoms? Part 1: Vacuum Hardware
Over in the reader request thread, Richard asks for experimental details: I’d be interested in (probably a series) of posts on how people practically actually do cold atoms experiments because I don’t really know. I needed to take some new publicity photos of the lab anyway, so this is a good excuse to bust out… Continue reading What Do You Need to Make Cold Atoms? Part 1: Vacuum Hardware
Two Americas in Recovery
First Matt Yglesias and then Kevin Drum nail the current source of my occasional spasms of liberal guilt, namely the unequal distribution of the current economic troubles. They both note that the unemployment rate for college graduates is less than half that for folks without college degrees (Matt looks at total unemployment, Kevin at long-term… Continue reading Two Americas in Recovery
How to Teach Physics to Your Dog, Sideways
A Japanese physicist who I worked with as a post-doc spotted the Japanese edition of How to Teach Physics to Your Dog in the wild, and picked up a copy. He sent along a scan of a couple of pages of the text, one of which I reproduce here: I had totally forgotten that Japanese… Continue reading How to Teach Physics to Your Dog, Sideways