Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Refraction of Light PLEASE HELP

  1. Mar 8, 2009 #1
    1. The problem statement, all variables and given/known data
    A beam of sunlight with a wavelength of 500 nm strikes an ice floe at an angle of 66.5 If ice has an index of refraction n=1.31, at what angle is the beam refracted?

    2. Relevant equations
    Law of Refraction- n(i) sin 0(i)=n (r) 0 (r')

    3. The attempt at a solution

    I'm completely lost. I am not familiar with the sin key.
  2. jcsd
  3. Mar 9, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi tymartin! Welcome to PF! :smile:

    (have a theta: θ and a degrees: ° :wink:)

    This is Snell's law …

    key in 66.5, make sure your calculator is using degrees ("deg") not radians ("rad"), and press "sin" …

    that gives you sin65.5º …

    now find the sin of the angle of refraction, key it in, and find the thing on your calculator that converts the "sin" key to inverse sin (sin-1), and press the "sin" key again :wink:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook