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!

Wave nature of light problem

  1. May 3, 2005 #1
    Given a wavelength length [tex]\alpha[/tex], what is the maximum Width (D) of a single slit, which would have no diffraction minima?

    It seems like a proof problem to me and I am trying to get a head start.
    should I use [tex] D * sin (\theta) = m \alpha[/tex] ?
     
  2. jcsd
  3. May 3, 2005 #2

    OlderDan

    User Avatar
    Science Advisor
    Homework Helper

    Yes, that and what you know about the sine function.
     
  4. May 3, 2005 #3
    that sin of zero degrees is 0
     
  5. May 4, 2005 #4

    OlderDan

    User Avatar
    Science Advisor
    Homework Helper

    Yes, but at zero degrees you will never have a minimum. From the geometry of the single slit diffraction setup, to not find any minima after the slit, the angle [itex] \theta [/itex] would have to be 90 degrees for the first minimum. So then what does

    [tex] D * sin (\theta) = m \alpha[/tex]

    tell you about D?
     
  6. May 4, 2005 #5
    I see, so [tex]D sin (90) = (1) \alpha[/tex], which is the first minimum, and D has to be equal to the wavelength [tex]\alpha[/tex].
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Wave nature of light problem
  1. Wave Nature of Light (Replies: 2)

Loading...