color

Dot Physics

Category archives for color

Blue laser awesomeness

Yes, green laser pointers are cool. Especially when you use them to make stuff fluoresce. Ok, what about a blue laser pointer? They are getting surprisingly cheap (Amazon has a 10 mW for pretty cheap). Still not cheap enough for me. But, you know what? Some of the physics majors here at Southeastern Louisiana University…

How do color filters work?

So you have seen these color filters (or gels as they are also called). When you look through a red filter, everything looks red. What do they do to the light? I am not going to tell you the answer. However, I will show you some examples so that you can figure out the answer…

My kids like books. Especially when they are going to bed. I let my daughter pick a book and she picked “Clam-I-am. All About the BEACH” by Trish Rabe. It is nice, it rhymes. The pictures are pretty. Then I get to this page: ![page](http://scienceblogs.com/dotphysics/wp-content/uploads/2008/09/page.jpg) So, the ocean is blue because of the sky? How…