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!

What fraction of light is reflected from the air water interface?

  1. Mar 2, 2005 #1
    What fraction of light is reflected from the air water interface? i.e. How intense is your reflection from a lake?

    since the reflection coefficient is [tex] R = (\frac{n_{2} - n_{1}}{n_{1} + n_{2}})^2 [/tex]

    n1 = 1 and n2 = 1.33 so R = 0.248. I am not sure how to interprete this?

    25% of the light reflects?? is that the appropriate answer?
     
    Last edited: Mar 2, 2005
  2. jcsd
  3. Mar 2, 2005 #2

    learningphysics

    User Avatar
    Homework Helper

    Yes. 25% is reflected. 75% is transmitted (refracted).

    EDIT: Check your calculation. I get R=0.02, So 2% is reflected.
     
    Last edited: Mar 2, 2005
  4. Mar 2, 2005 #3
    so th fraction would be 1/4 right? Thanks for the help!!
     
  5. Mar 2, 2005 #4

    learningphysics

    User Avatar
    Homework Helper

    I get R=0.02
     
  6. Mar 2, 2005 #5
    As did I. R = .02
     
  7. Mar 2, 2005 #6
    i think you are forgetting to square it it's (0.33/1.33)^2 = 0.062
     
  8. Mar 2, 2005 #7
    Nope.

    [tex](\frac{1.33-1}{1 + 1.33}) = .1416.....[/tex]

    [tex].1416309^2 = .020059....[/tex]

    I don't see the problem.

    EDIT: You divided by the wrong number...it's 2.33 not 1.33
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What fraction of light is reflected from the air water interface?
Loading...