1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Experiment question

  1. Nov 16, 2006 #1
    Hey all...I am wondering if anyone knows what this experiment is called and "what is wrong with it".

    It was a large, clear light bulb with these 4 "wings" on the inside of it that were black on one side and white on the other. When you shine on a flashlight on it, the "wings" began to rotate on its axis. We are discussing electromagnetic waves in class and I think the prof. was demonstrating the effect of light radiation being able to produce power...?? At any rate, he said there is something "wrong" with it and we are supposed to figure what that is. He wouldn't tell us the name of the experiment so I'm at a loss. He kept saying the light was "pushing" the black side. I have tried to look at google and other sites with key words but no luck as of yet. Any suggestions or revelations would be greatly appreciated!

    Plus...I am dumb and don't know how to start my own post so I just tagged onto this one...figured the title of the previous post would serve me well. :)
  2. jcsd
  3. Nov 16, 2006 #2


    User Avatar

    Staff: Mentor

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?