1. Limited time only! Sign up for a free 30min personal 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!

I Rotating coherent laser beam

  1. Sep 1, 2016 #1
    if a coherent laser beam rotates about an axis at very high angular frequency
    can a light dot with radiant glow (of short radius) be obtained due to persistence of vision ?
  2. jcsd
  3. Sep 1, 2016 #2


    User Avatar

    Staff: Mentor

    Rotate about which axis? Do you mean like with scanning laser displays?

    ' laser-display.jpg
  4. Sep 2, 2016 #3
    rotates about axis normal to laser beam .
  5. Sep 2, 2016 #4


    User Avatar
    Science Advisor

    You mean there is only one point in space (filled with some scattering medium like air), where the beam always passes? You will get an approx. linear fall-off from that point. Maybe if instead of scattering you use some form of excitation of the medium, you might get different effects.
  6. Sep 2, 2016 #5
    please explain
  7. Sep 2, 2016 #6


    User Avatar
    Science Advisor

  8. Sep 2, 2016 #7
    can this concept be employed in holography
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted