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Question on young's double experiment

  1. Mar 15, 2010 #1
    why we have to kept opaqe screen parllel to the two slits in young's double slit experiment?
     
  2. jcsd
  3. Mar 15, 2010 #2

    tiny-tim

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    Welcome to PF!

    Hi SAINATHAN! Welcome to PF! :wink:

    We don't have to …

    but it makes the maths easier, and the picture more symmetric and prettier. :smile:
     
  4. Mar 15, 2010 #3
    If the rest of teh screen wasn't opaque, but was see-thru, you would really no longer have two slits but just ahve a sheet of transparent material with two slits in it. This would result in the fringes and light spots being obscured by all the other light getting through,
     
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