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Homework Help: Width of Aperture please help

  1. Mar 24, 2008 #1
    Width of Aperture...please help!!!

    1. The problem statement, all variables and given/known data
    A point source of light illuminates an aperture 2.3 m away. A 10.2-cm-wide bright patch of light appears on a screen 1.02 m behind the aperture. How wide is the aperture?

    2. Relevant equations

    3. The attempt at a solution
    I can't figure out how to do this???
  2. jcsd
  3. Mar 24, 2008 #2
    woops this was supposed to go under physics...please remove! thanks!
  4. Mar 24, 2008 #3


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    Science Advisor
    Homework Helper

    … just geometry …

    Actually, this is geometry, not physics.

    Just draw a diagram, apply ordinary geometry of similar triangles, and you should get the answer! :smile:
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