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Homework Help: Interference/Diffraction Shadows

  1. Sep 25, 2008 #1
    1. The problem statement, all variables and given/known data
    At 11:00hrs a vertical stick in air, 1.8 m long, casts a shadow 1.2 m long. If the same stick is placed at 11:00hrs in air in a flat bottomed pool of salt water half the height of the stick, how long is the shadow on the floor of the pool? (For this pool, n = 1.56.)

    2. Relevant equations
    Not sure...=/

    3. The attempt at a solution
    Don't know were to start >.<
  2. jcsd
  3. Sep 26, 2008 #2


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    Science Advisor
    Homework Helper

    Hi Aeighme! :smile:

    Start by calculating the angle of the sun above the horizon. :smile:
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