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Homework Help: Single slit Diffraction

  1. May 17, 2009 #1
    1. The problem statement, all variables and given/known data

    Monochromatic green light of wavelength
    546 nm falls on a single slit with a width
    of 0.095 mm. The slit is located 75 cm from
    a screen. How wide will the central bright
    band be?

    2. Relevant equations

    D sin 0dark = m 入

    3. The attempt at a solution

    Can someone tell me why i keep getting double of the answer? ans is 4.3 mm
  2. jcsd
  3. May 18, 2009 #2
    Aren't you measuring all the way to the centre of the dark band and considering that to be the width of the bright band? Surely you should stop halfway.

    This is useful...

    http://www.walter-fendt.de/ph14e/singleslit.htm" [Broken]
    Last edited by a moderator: May 4, 2017
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