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Homework Help: Circular Diffraction Patterns

  1. Jul 16, 2010 #1
    Circular Diffraction Patterns HELP!

    1. The problem statement, all variables and given/known data
    4rxe2s.jpg


    2. Relevant equations

    theata_1=1.22(lambda)(L)/D L distance from screen, D diameter of slit

    w=2.44(lambda)(L)/D

    3. The attempt at a solution
    so this is what i did not sure where i went wrong maybe at rounding off...

    w=2.44(lambda)(L)/D

    (10.3/1000)=92.44)(633*10^(-9))(0.8)/D

    solving for D i got the diameter to be the following

    D=0.119962....mm

    i rounded off to three significant figure

    D=0.120mm is this correct b/c when i did this i got it wrong, could some one tell me where i went wrong this.
     
    Last edited: Jul 16, 2010
  2. jcsd
  3. Jul 16, 2010 #2

    Doc Al

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    Staff: Mentor

    Re: Circular Diffraction Patterns HELP!

    I agree with your answer.
     
  4. Jul 16, 2010 #3
    ok ill try it again and see if it works
     
  5. Jul 16, 2010 #4

    Ush

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    before you try it a again, there's an option to check what you put as your last answer, ^ might want to check that first before using an attempt
     
  6. Jul 16, 2010 #5
    it worked, before i messed up the decimal place, now correct,

    Thanks for helping Doc Al
    Brown arrow.
     
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