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!

I Diffraction Grating

  1. Dec 6, 2016 #1
    A) Find the diffraction order from the grating that has an angle of incidence of 40 degrees and a diffraction angle of 20 degrees. The wavelength of incident light is 500nm and the spacing between the grooves on the grating are 5 micrometers
    B) If I want to selectively emit 500 nm wavelength from the grating, what is the actual range of wavelengths that would be diffracted if the grating had 6500 grooves.

    I was able to answer part A easily but I can figure out part B. This is for a chemistry class and I cant find any relevant formula. The only ones from the book are snells law and n(Lambda)=d(Sin(theta)+sin(Phi)) and that's no use.

    What is/are the relevant formula(s)?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted