Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Please identify pictures

  1. May 6, 2008 #1


    User Avatar

    I was playing with a laser pointer and a concave mirror and I managed to get a 5mm beam to spread over a 30cm area.

    The irregular pattern remained stationary even when I moved the beam, so I guess it's due to (a) irregularities in the mirror or (b) impurities in the laser's lens?
  2. jcsd
  3. May 6, 2008 #2
    I expect you are talking about a speckle pattern... Look up laser speckle in Wikipedia...
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Please identify pictures
  1. Picture Question (Replies: 12)

  2. Are these pictures real? (Replies: 21)