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Some more angles and refraction a little twist this time

  1. Sep 11, 2007 #1
    1. The problem statement, all variables and given/known data

    An underwater diver sees the sun 50 degrees above horizontal.

    How high is the sun above the horizon to a fisherman in a boat above the diver?

    2. Relevant equations

    n΄sinθ΄ = n¹sinθ¹

    or, if that is confusing,

    n1sinθ1 = n2sinθ2

    3. The attempt at a solution

    I visualized it like this:



    and using that, found the other angle (θ2, 'opposite' to x) as 90-50 = 40

    so using the formula, i got this:

    (1)sin(x) = 1.33 sin (40),
    x =58.7485

    computer says this is incorrect, any help? thanks
  2. jcsd
  3. Sep 11, 2007 #2


    User Avatar
    Homework Helper

    You didn't get x... You got the angle of incidence which is 90-x.
  4. Sep 22, 2007 #3
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