Feb12
Green With Envy
5 comments posted in: Buttons

That’s what you will be when you see my new laser pen! It should project a green beam at night which will be useful for pointing out astronomical things to people. I’m going to try it out during my after-dinner talk at the Reading 41 Club tomorrow night.
Posted by Not telling on Thu, February, 14, 2008 - 10:33 PM
Lasers don’t project a beam. They emit coherant photons of light. It only appears to be a beam because the light reflects of the dust in the atmosphere.