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!

Homework Help: Light Refraction

  1. Jun 1, 2008 #1


    User Avatar

    1. The problem statement, all variables and given/known data

    A ray of light strikes a piece of glass (n=refraction index=1.5), making an angle of 30 degrees with the surface. What angle does the refracted ray make with the surface?

    2. Relevant equations

    Snell's Law: n1*sin(theta1)=n2*sin(theta2)

    3. The attempt at a solution

    We're only given one n...how do I do this?
    Last edited: Jun 1, 2008
  2. jcsd
  3. Jun 1, 2008 #2
    Is the question assuming that it's coming from air?
  4. Jun 1, 2008 #3


    User Avatar
    Science Advisor
    Homework Helper

    Hi bfr! :smile:

    easy-peasy … you can assume that, for air (it is air, isnt it? :rolleyes:), n = 1. :smile:
  5. Jun 1, 2008 #4


    User Avatar

    OK, I didn't know we're just supposed to assume that n=1, thanks.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook