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!

Optics - Slit(s)?

  1. Apr 28, 2014 #1
    1. The problem statement, all variables and given/known data
    Laser light is projected into two small slits that are 1mm apart. The fringe pattern on the screen is missing the 4th bright fringe. That is, there is a bright center fringe and three more bright fringes to either side of the central bright fringe, but the 4th one is missing. For that matter, the 8th is missing too. What is the size of the slit(s)?


    2. Relevant equations
    asinΘ=mλ


    3. The attempt at a solution
    3_3.jpg
     
  2. jcsd
  3. Apr 29, 2014 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    That's quite messy - it is difficult to see what you've done.
    Please show your reasoning with your working.
    The marking seems pretty straight forward - you have miscounted the dark fringes, and attempted to count the dark fringes of the wrong diffraction pattern.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Optics - Slit(s)?
  1. M/s/s Help (Replies: 7)

  2. Electromagnetics ?'s (Replies: 1)

  3. Rad/s to rev/s (Replies: 5)

Loading...