1. Limited time only! Sign up for a free 30min personal 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!

Calculate the angle out

  1. Apr 14, 2009 #1
    1. The problem statement, all variables and given/known data
    Light is incident on an equilateral crown glass prism at a thetain = 43.5o angle to one face, as seen in the figure below.
    http://capa-new.colorado.edu/giancoli_lib/Graphics/Graph23/gian2351.gif
    Calculate the angle (thetaout) at which light emerges from the opposite face. Assume that n = 1.52.
    2. Relevant equations
    ok so i did snells law and found it to be 26.94 deg.
    so i know also that a triangle is 180 deg so i should just be able to subtract it all and get the answer

    3. The attempt at a solution
    well i subtracted it and got 109.56 deg and it was wrong
     
  2. jcsd
  3. Apr 14, 2009 #2

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    work out the angle that it strikes the other face first and then apply Snell's law again.
     
  4. Apr 14, 2009 #3
    i dont get what u mean by that?
     
  5. Apr 14, 2009 #4

    Kurdt

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    The beam of light is refracted on the other surface of the prism, correct? What is the incident angle for that surface? Then you can work out the angle it leaves the prism.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Calculate the angle out
  1. Figuring out angle? (Replies: 2)

  2. Working out angle. (Replies: 3)

  3. Angle Calculation (Replies: 4)

Loading...