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!

Index of refraction

  1. Mar 15, 2005 #1
    I have input rays into a glass plate and output rays for this glass plate also. How can I prove that they are indeed parallel. I'm thinking all I need to do is extend the inout and output rays, and indicate that they are both 180 deg. Visually, they will appear parallel anyways.
  2. jcsd
  3. Mar 15, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    You could use Snell's law and show that the angle of incidence at the first surface is equal to the angle of refraction at the surface where the beam leaves the plate.

    Supplied with a pretty picture ofcourse.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Index refraction Date
How to find unknown refractive index to solve for theta Feb 17, 2018
Refractive index Dec 12, 2017
Constant thickness lens varying refractive index Oct 1, 2017