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B Apparent Depth Equation

  1. May 23, 2016 #1
    Hi, can someone please explain to me where this equation derives from and how it works?
    d'=d(n2/n1)
    where d'=the apparent depth of the object, d=the actual depth, n1= the index of refraction of the medium in which the refracted light travels, and n1= the index of refraction of the medium in which the incident light travels
     
  2. jcsd
  3. May 23, 2016 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF.

    Have you learned about Snell's Law yet? :smile:

    https://en.wikipedia.org/wiki/Snell's_law
     
  4. May 23, 2016 #3
  5. May 23, 2016 #4

    berkeman

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    Staff: Mentor

    Great! Then you should be able to make a first attempt at deriving that depth equation. Start with the first figure at the wikipedia link, and change it to be an observer looking down at an object under water...
     
  6. May 23, 2016 #5
    Something like this? Where P is where the observer is and I is the image of where the object appears to be Snells_law2.svg.png
     
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