1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Elevation of Sun above water surface

  1. Feb 8, 2014 #1
    1. The problem statement, all variables and given/known data

    An underwater scuba diver sees the Sun at an apparent angle of 44.5° above the horizontal. What is the actual elevation angle of the Sun above the horizontal? (Use 1.333 for the index of refraction of water.)

    2. Relevant equations

    n1sin(Θ1) = n2sin(Θ2)

    3. The attempt at a solution

    I've been doing:

    1.333*sin(43) = .9091

    sin-1(.9091)= 65.38

    90-65.38 = 24.62 degrees

    Where am I going wrong?? The answer is 12.9 degrees, but every time I try to do it, I get 24.62 degrees.
     
  2. jcsd
  3. Feb 8, 2014 #2

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    Where does the 43 come from?

    I get 18 degrees.
     
  4. Feb 9, 2014 #3

    What are the steps you're taking?
     
  5. Feb 9, 2014 #4

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    90-44.5 = ?
     
  6. Feb 9, 2014 #5

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    The same steps as you, just with the right numbers. See the open question in post 2 and 4.
     
  7. Feb 10, 2014 #6
    I don't understand where you see a 43?
     
  8. Feb 10, 2014 #7

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    I highlighted it.
     
  9. Feb 10, 2014 #8
    Shoot sorry, I copied it over and forgot to change it. It should be 44.5

    But I still don't get the correct answer
     
  10. Feb 10, 2014 #9

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    No, not that either: 44.5° above the horizontal
     
  11. Feb 19, 2014 #10
    What does that mean?? I tried 90-44.5 and 180-44.5 but it doesn't work. Am I going crazy??
     
  12. Feb 19, 2014 #11

    haruspex

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    2016 Award

    That should do it. Please post you working.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Elevation of Sun above water surface
  1. Height Above Water (Replies: 1)

Loading...